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mod 6 > 6.5 fasteners > Flashcards

6.5 fasteners Flashcards

1
Q

What can be used to measure the screw thread pitch?

A

A screw thread pitch gauge

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2
Q

How do you know if the thread pitch has been identified?

A

If the gauge matches up with the thread

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3
Q

What are screw thread pitch gauges used for?

A

To identify external or internal screw threads

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4
Q

What does the class of fit indicate?

A

The tolerance

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5
Q

What does Class 1-5 mean?

A

Class 1 loose fit
Class 2 free fit
Class 3 medium
Class 4 close
Class 5 tight

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6
Q

What class are aircraft bolts normally?

A

Class 3

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7
Q

What does a class 4 fit require that a class 1 fit doesn’t?

A

A wrench, whereas a class 1 can turned with fingers

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8
Q

What class are aircraft screws manufactured in?

A

Class 2 thread fit

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9
Q

What is BSW summed up?

A

British standard course thread which is recommended for general purpose works in metal and plastic

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10
Q

What about the BSW thread makes it suitable for quick assembling and disassembling of components?

A

The Whitworth thread

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11
Q

What are the features of a BSW?

A

It has a symmetrical vee shape and an angle of 55 degrees and is roused weekly at the root and the crest

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12
Q

What is BSF summed up?

A

It is a finer version of the Whiteworth thread form

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13
Q

What two important features related to a finger thread do BSF have?

A

It increases the resistance against vibration and creates a finer form of adjustment

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14
Q

A BSF screw will always have more screws per what?

A

2.5cm

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15
Q

What is BSP summed up?

A

Another finer thread adaptation of the Whitworth thread form

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16
Q

Where are a BSP used?

A

In pipe couplings

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17
Q

What can ensure a BSP has a pressure tight joint?

A

What can ensure a BSP has a pressure tight joint?

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18
Q

What does the fine pitch ensure on BSP?

A

Uncut metals remain on the wall of a pipe

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19
Q

What is BA summed up?

A

A fine pitch thread used for 6.35 (1/4) in diameter only

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20
Q

What is BA used for?

A

Smaller mechanical and electrical parts

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21
Q

What is different about expressions in BA?

A

They’re expressed numerically

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22
Q

in BA threads, what is the popular size range?

A

0-10

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23
Q

In BA threads, the larger the number….
and the smaller the number….

A

The smaller the thread
The larger the thread

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24
Q

Why does the BA differ in terms of degrees?

What is retained?

A

47.5 degrees

The feature of equal rounding for root and crest

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25
Q

What are the American standard threads?

A

ANF
ANC

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26
Q

What are the features of AN thread forms?

A

The flattening of the crest and root in the AN is not equal and the thread angle sits at 60 degrees.

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27
Q

What are unified thread forms?

A

Incorporates features from British and American national threads

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28
Q

Are the differences in the American and British interchangeable?

A

Yes

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29
Q

What are the three versions of UN?

A

UNC
UNF
UNEF

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30
Q

What does the shape or profile of the screw thread depend upon?

A

Its job

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31
Q

What is the symmetrical vee thread designed to combine?

A

Strength with ease of engagement

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32
Q

What do square roots have powerful of?

A

Roots

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33
Q
A
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34
Q
A
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35
Q

What are square threads used for?

A

Carrying heavy loads, transfer of power and exerting, screw jack and vice spindle

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35
Q

The specific measurement or number per inch of threads are not what in square roots?

A

Particular

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36
Q

What are buttress threads?

A

They have a triangular section, one face at the right angle and the other is sloped

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37
Q

What power do buttress threads have?

A

Pulling

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38
Q

What are ACME threads summed up?

A

Similar to square threads but are tapered

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39
Q

What are ACME threads summed up?

A

Similar to square threads but are tapered

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40
Q

Because of ACME’s slanted ends, what is made easier?

A

easier to fix or unscrew the split nut but do not have backlash in it

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41
Q

What is ACME’s degrees?

A

29 degrees

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42
Q

What are squares ideal for?

A

Ideal thread for power transmissions

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43
Q

Is acme stronger than square threads?

A

Yes

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44
Q

What are the buttress threads designed for?

A

Designed to handle forces in one direction
(eg true jack)

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45
Q

What does a nut act as?

A

Secure it in place

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46
Q

What is a boot used for?

A

To hold two or more items together

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47
Q

What is a bolts diameter increments in?
What is a bolts length increments in?

A

1/16
1/8

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48
Q

What type of heads do bolts have?

A

Hex

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49
Q

What does the diameter of a bolt equalate to?

A

The Diameter of the shank

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50
Q

What is a bolts grip length?

A

The length of the unthreaded portion

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51
Q

When must washers be added to a bolt and why?

A

If the grip length is slightly longer than the total thickness of the material

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52
Q

What can result in a weaker joint?

A

When the thread goes into the material because the grip length is less than the thickness of the material (thread goes in)

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53
Q

What does ‘A’ mean in a bolt?

A

It is not drilled for a split pin

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54
Q

What is the diameter in, AN3-6A

What is the length?

What does ‘A’ mean

A

3 diameter in 1/16

6 length in 1/8

It does not have a hole for a split pin

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55
Q

How do you know if it is drilled for a split pin?

A

There is no letter

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56
Q

How is a corrosion resistant bolt identified?

A

With the letter C (in between length and diameter)

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57
Q

How are aluminium alloys identified?

A

DD

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58
Q

How does a cadmium plated nickel steel look?

A

A star

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59
Q

How does corrosion resistant bolt look?

A

A single dash

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60
Q

How does 2024 aluminium bolt look?

A

Two dashes

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61
Q

What do bolts have marked on their heads?

A

Material identification NDT manufacturer’s data

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62
Q

What size does the FAA forbid?

A

AN3

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63
Q

What are not allowed to be used in sea planes?

A

Aluminium alloy nuts used with cadmium plated steel bolts in shear

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64
Q

What AN bolts must be wire locked?

A

Fastening propellers

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65
Q

A wire locking bolt has what letter?

A

H

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66
Q

When are clevis bolts used?

A

in shear

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67
Q

What AN is clevis bolts?

A

AN21 AN36

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68
Q

What does a clevis bolt look like?

A

It has a domed head that is slotted

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69
Q

what is a unique feature of a clevis bolt?

A

Only a small portion of the shank is threaded

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70
Q

What does the small notch between the threads and shank do?

A

Long grip length which increases the bolts shears strength and allows the bolt to move more freely

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71
Q

What is the length and diameter of a clevis pin?

A

1/16

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72
Q

What AN are eye bolts?

A

AN42 AN49

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73
Q

AN42 AN49

A

Where external tension loads are to applied

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74
Q

What is the head of an eyebolt specifically designed for?

A

Attachment of turnbuckle which connects two cables

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75
Q

What is the threaded shank drilled for?

A

Safe tying

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76
Q

What AN are drilled head engine bolts?

A

AN73 AN81

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77
Q

What is different about drilled engine heads?

A

They are thicker and have drilled heads in the centre of the head and around the flats

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78
Q

What is the diameter of a drilled engine head?

What is the length?

A

1/16 increments

1/8 increments

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79
Q

What AN are close tolerance bolts?

A

AN 173 AN186

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80
Q

What is the close tolerance bolts tolerance?

A

+0.000 -0.0005 inch

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81
Q

Where are close tolerance bolts used?

A

In areas prone to pounding or in a structure that is about to be rivited or bolted

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82
Q

How can you recognise a close tolerance bolt?

A

It has a triangle on its head

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83
Q

When are internal wrenching bolts used?

A

When are internal wrenching bolts used?

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84
Q

What sided hole is drilled into internal wrenching bolts?

A

6 sides to accept an Allen wrench

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85
Q

What must occur to the hole when installed in steel parts to accommodate the radius?

A

Counterbore

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86
Q

When an internal wrenching bolt is installed in aluminium structure, why must a washer be used?

A

To pre de needed bearing area.

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87
Q

What must an AN bolt never be substituted for?

A

An internal wrenching bolt

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88
Q

What are the NAS length increments?

A

1/8

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89
Q

Where is the grip length measured on a NAS bolt?

A

Beneath the head end of the thread

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90
Q

What are odd dash numbers?

A

Special application bolts

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91
Q

What are odd dash number’s grip length longer than?

A

1/16

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92
Q

When are odd dash numbers used?

A

Where a standard MS bolt is either too long or too short

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93
Q

What does the basic NAS number identify?

A

The part

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94
Q

What are most aircraft’s bolts measured by?

A

Their grip length

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95
Q

How do AN bolts bolts differ in terms of measuring?

A

They’re measured by their overall length

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96
Q

What are MS bolts’ dash numbers like?

A

Even

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97
Q

Where are odd dash numbers available in MS bolts?

A

When the grip length is critical and a standard grip is either too long or too short

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98
Q

Where must the load be on an MS bolt?

A

On the shank not on the thread

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99
Q

What must you refer to when purchasing fasteners?

A

Aircraft illustrated parts

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100
Q

how many numbers are NSA specification?

A

Is a four digit number

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101
Q

What is the first dash in the four digit specification in NSA?
What is the second dash number?

A

The diameter in 1/16 increments
1/16 in grip length

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102
Q

Where are studs installed?

A

In internal threads in a casting or built up assembly

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103
Q

If internal threads are damaged, what are the two alternatives?

A

To repair the part or repair and replace the threads

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104
Q

What does Heli Coil protect against?

A

Wearing because of continuous insertion

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105
Q

Heli coils are available for what type of thread standards?

A

All

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106
Q

What sort of cross section does helicoils have?

A

Diamond cross section

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107
Q

When will the tang break off?

A

When it reaches a certain tension

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108
Q

What are the two types of Heli coil?

A

The standard types
The screw lock type

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109
Q

What is a standard type of Heli coil?

A

Provides a free running thread

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110
Q

How do Heli coil inserts compensate for their lead and angle errors?

A

They self adjust

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110
Q

What is a screw lock type Heli coil?

A

Provides a resilient internal lock thread

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111
Q

How do screw’s differ from bolts?

A

They are made from a lower strength materials

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112
Q

What threads are screws fitted with?

A

A loose fitting thread

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113
Q

What are the head shapes of screws made for?

A

To engage a screwdriver or wrench

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114
Q

What are the three basic classifications of screws?

A

Machine screws
Structural screws
Self tapping screws

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115
Q

What do structural screws have the same strength as?

A

Bolts

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116
Q

What are self tapping screws used for?

A

To join lightweight materials

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117
Q

What are machiene screws used for?

A

Attaching light structural parts such as fairings or fluid lines

118
Q

What is the main difference between aircraft’s screws and bolts?

A

Threads of machine screws run the full length of the shank
Bolts have a unthreaded grip length

119
Q

What class fit do machine screws have?

A

Class 2 (loose fit)

120
Q

What are the most common machiene screws used in aviation?

A

Fillister screws, the round head screws, the flat head screw the truss head screw

121
Q

What are structural screws made out of?

A

Alloy steel that are heat treated

122
Q

What else can stuctural screws be used for?

A

Structural bolts

123
Q

What are structural screws available with?

A

Fillister flat or washer heads

124
Q

What are the threads used in structural screws?

A

National fine, hex head bolts

125
Q

What must you never use on a torque set screw?

A

A Philips screwdriver

126
Q

What must you never use on a Hi torque screw?

A

A slotted screwdriver

127
Q

What threads do self tapping screws have?

A

Course threads

128
Q

What are self tapping screws used for?

A

To hold thin sheets of metal plastic or plywood

129
Q

What does type A self tapping screws have?

A

A gimlet (sharp point)

130
Q

What does type B self tapping screws have?

A

A blunt point with thinner threads

131
Q

What are the four types of heads available on self tapping screws?

A

Round head
Truss head
Countersunk
Countersunk oval

132
Q

What is different between the round head screw and the truss head screw?

A

The truss head screw is thinner

133
Q

What is a dowel?

A

A solid cylindrical rod

134
Q

What is a dowel called in its original manufactured form?

A

A dowel rod

135
Q

When are dowels used?

A

Where precision alignment and correct orientation of two mating surfaces is required.

136
Q

Smooth solid dowel pins are made with high quality steel metallic to ensure what?

A

Smooth solid dowel pins are made with high quality steel metallic to ensure what?

137
Q

What are split hollow dowels used for?

A

To maintain alignment and act as bushing for rotating

138
Q

What do structural screws have the same grip strength as?

A

Bolts of the same size

139
Q

When is a lock washer used?

A

If the joint is not structurally critical

140
Q

What is a lock washer?

A

The spring action of the washer creates friction

141
Q

What is a spring washer?

A

A double coil spring or single coil with sharp edges. it is compressed and creates friction

142
Q

What is a tab washer?

A

Two or more tabs that are suitable for a plain nut

143
Q

Can you re use a tab washer?

A

No

144
Q

What is a shakeproof washer?

A

a spring steel washer with slanted serrations on its internal or external surface

145
Q

Why is there an angle of serrations in a shakeproof washer?

A

For the nut to ride them and cut into them

146
Q

Can you reuse shakeproof washers?

A

Yes if they retain its springiness

147
Q

Where are drilled head bolts often used?

A

In vibration prone areas

148
Q

What is the wire diameter measured in?

A

1/1000

149
Q

What is a minimum of twists per inch?

A

6-8 twists per inch

150
Q

In critical areas where a number of bolts must be secured by wire what is the maximum number of bolts?

A

3

151
Q

How are locking plates secured to the structure?

A

They’re secured to an adjacent sort

152
Q

What are lock plates held in place by?

A

Shakeproof washers and tab washers

153
Q
A
154
Q
A
155
Q

Can lock plates be reused?

A

yes if they remain good fit

156
Q

What are pal nuts?

A

They’re a spring locking action nut which provides lightweight vibration proof in low profile

157
Q

Are pal nuts designed to be with or without a standard nut?

A

Both`

158
Q

Where are pal nuts idea in use?

A

Where frequent load changes tend to loosen conventional nuts

159
Q

What are quick release fasteners?

A

They provide vibration resistance for quick and repetitive attatchment and removal of panels with minimal effort

160
Q

What does locking and unlocking a quick release faster require?

A

A quarter turn or push

161
Q

What are the two types of Dzus fasteners?

A

Light duty type
Heavy duty types

162
Q

What are light duty type fasteners?

A

Used on box covers, access hole covers and lightweight fairings

163
Q

What are heavy duty fastners?

A

Used in cowlings and heavy fairings

164
Q

What is the main difference between the two Dzus fastners?

A

A grommet is used with heavy duty fastners

165
Q

What does the airloc consist of?

A

A receptacle, a stud and a cross pin

166
Q

What are the two types of airloc?

A

The fixed type
The floating type

167
Q

What does the floating type consist of?

A

Easier alignment of the stud into the receptacle

168
Q

What can Camloc fastners be referred to?

A

Quarter turn fastners

169
Q

What are camloc designed to do?

A

They’re designed to connect quick and easy in confined spaces

170
Q

What helps to save time in Camloc?

A

Turn latches

171
Q

What are Camlocs resistant to?

A

Vibration

172
Q

The quick turn fastners usually consist of what?

A

A stud a washer and receptacle

173
Q

What is a pip pin?

A

They’re non threaded fastners allowing the rapid installation and removal of parts without tooling

174
Q

What are the two versions of pip pins?

A

Locating and locking version

175
Q

What are rung pull detect pins?

A

A single ball locates the pin, no positive pin. For locating purposes

176
Q

What is a double acting steel pin?

A

To release the ball lock mechanism. The ring handle can be pushed in or pulled out

177
Q

What are circlips?

A

A spring clip used for internal and external washing

178
Q

What are cir clips used for?

A

Retaining shafts seams and bearings

179
Q

What are used to open or compress the circlips?

A

Special pliers

180
Q

What are taper pins?

A

Is a joint that is created for shear loads that does not allow any loose motion or play

181
Q

What are roll pins?

A

They are used to provide propping for a joint where the pin is not likely to be removed

182
Q

What is a roll pin made up of?

A

It is cylindrical but the ends or not joint which helps it to compress in the joint

183
Q

What are clevis pins used for?

A

Hinge Pins

184
Q

How do you remove a roll pin?

A

With a pin punch

185
Q

What are clevis pins increments?

A

What are clevis pins increments?

186
Q

What pins are inserted into clevis pins?

A

Split pins

187
Q

What must never happen with split pins?

A

They must never be over torqued to make the holes align

188
Q

What must happen if the nut fails to align with the drilled bolt hole?

A

Add washers until a split pin can be inserted

189
Q

What is a key?

A

Formed metal that fits into cut outs

190
Q

What is the advantage of Woodruff key?

A

Once it is placed in the part, it is unable to move

191
Q

What is a square key?

A

They tend to move out of their slots unless placed by a locking fastner

192
Q

What is a Pratt and Whitney key?

A

Once it is placed in the part it is unable to move. Also known as the Sunken key

193
Q

What is the gib head key?

A

It’s tapered and driven in place

194
Q

What governs insertion depth and allows removal?

A

The tang

195
Q

What does the gib head key require?

A

Retention in critical applications

196
Q

What are the two self locking nuts used in aviation?

A

The fibre or the nylon type

197
Q

What can happen if three threads are exposed in self locking nuts?

A

It can bottom out and create a stress point

198
Q

What corrective action must you take if it bottoms out?

A

You must replace the bolt or add washers

199
Q

What are low temperature self locking nuts not meant to be used in?

A

Temperature must not excited 122

200
Q

What are self locking nuts held in place by?

A

A nylon insert

201
Q

What are low temperature self locking nuts class in terms of fit?

A

Class 3

202
Q

Self locking nuts must not be used where?

A

In tension only shear

203
Q

What must be used when temperature exceeds 121?

A

Metal lock nuts must be used

204
Q

What do metal lock nuts look like?

A

The nut has a smaller diameter compared to the boys to grip the bolt

205
Q

When are castellated nuts used?

A

Class 3 shear or tensile loads

206
Q

What does a shear castle nut have the same type thread as?

A

AN310

207
Q

What are different about shear castle nuts?

A

They’re only used for shear so are much thinner

208
Q

What do plain nuts not have?

A

Castellations so can’t have a split pin so must use a spring type washer instead

209
Q

What loads do plain nuts require?

A

Shear and tensile

210
Q

What is a plain nut locked in place with?

A

A check nut

211
Q

What is a check nut?

A

A second nut that tightens it

212
Q

What is a check nut?

A

A second nut that tightens it

213
Q
A
213
Q

Where are light hex nuts used?

A

In non structural appliances requiring light tension and they need a locking device to secure them

214
Q
A
215
Q

What class fit are engine nuts?

A

class 3

216
Q

What does a plain engine nut not have?

A

Holes for split pins

217
Q

What size does a plain engine nut fit?

A

11.1

218
Q

When is the use if a wing nut necessary?

A

To remove a part frequently without the use of tools

219
Q

What is a lock nut?

A

Two nuts are screwed onto the outer thread if the stud

220
Q

What do anchor nuts do?

A

They’re permenantly mounted nuts that enable inspection plates and access doors to be completely removed

221
Q

What is a stud?

A

A shaft that is threaded at both ends but one is a long thread the other is shirt thread

222
Q

What is the short thread?

A

A coarse thread and a much tighter fit than the long thread

223
Q

When are studs used?

A

Where joints have to be broken frequently

224
Q

What does a stud not have?

A

A head

225
Q

What is a standard stud?

A

Most commonly used. They have the same diameter for the threaded major diameter and the unthreaded portion

226
Q

When is a waisted stud used?

A

Where strength has to be retained but weight saving is required

227
Q

Where is a stepped stud used?

A

Provide stronger anchorage and used as replacements for plain studs

228
Q

What are shouldered studs?

A

Maximum rigidity is required against lateral stresses

229
Q

What is a stud box?

A

A hexagonal metal bar

230
Q

What is a stud insertion or removal tool?

A

The stud is started into the thread, the stud and tool turn together

231
Q

What are tinnerman nuts?

A

Theyre stamped out of sheet metals

232
Q

What are tinnerman nuts used for?

A

Riveted to a structure to hold screws and used to secure inspection plates

233
Q

What is a rivet?

A

A type of fastener that obtains its clamping actions by having one if it’s sides mechanically upset

234
Q

What happens when a rivet is driven?

A

The cross sectional area increases along with its bearing and shear strength

235
Q

How much must a rivet extend out of the material before driven?

A

1.5cm

236
Q

How much does the bucktail surface?

A

1.5cm

237
Q

After riveted, how much must the rivet extend?

A

One half the original diameter

238
Q

What does the first part of the code denote?

A

The rivets organisation

239
Q

What the second part represent?

A

Rivet alloying material

240
Q

What is the third digit?

A

The diameter indicated in 1/32

241
Q

What is the fourth digit called?

A

The length indicated in 1/16

242
Q

How is the length of a universal head rivet measured?

A

The bottom of the head to the end of the shank

243
Q

How is the head of a countersunk rivet measured?

A

From the top of the head to the end of the shank

244
Q

What is the countersink angle?

A

100 degrees

245
Q

What is dimpling?

A

Mechanically denting the sheets that are joined to accommodate the rivet head

246
Q

When installing a countersunk head rivet, how much is the head meant to protude?

A

0.005 to 0.007 of an inch

247
Q

If the head provides after firming, what can happen?

A

A rotary micro shaver can be used to flush the rivet head

248
Q

What is a left hand image?

A

If the rivet head is allowed to protude above the metal. The rivet guns energy hits the head resulting in a stronger joint

249
Q

What is a right hand image?

A

If a countersunk rivet is set with the rivet head flush with the surface, some of the rivet guns driving energy is lost

250
Q

What Is aluminium represented as?

A

A

251
Q

What is 2117 aluminium alloy known as?

A

AD with a dimple in his head.
Theyre always known as field rivets and have a dimple in the head

252
Q

What is 5056 Aluminium Alloy known as?

A

B. They have a raised cross on their head

253
Q

What is 2017 Aluminium alloy known as?

A

D. Extremely hard and have a raised dot in the centre of their head

254
Q

What is the new version of 2017 aluminium called?

A

The crack free rivet alloy

255
Q

Why must 2017 alloy be reheat treated?

A

They’re too hard to be driven one hour after heat treated

256
Q

How is intergranular oxidisation of 2017 Ally oxide prevented?

A

Its anodised before the first reheat treatment

257
Q

How can 2017 be soft enough to be used for several days?

A

By putting it in the freezer below 0 degrees

258
Q

What temp are 2017 Ally alloys subjected to when heat treated?

A

499 to 510 for 30 minutes and immediately quench in water

259
Q

2024 Aluminium Alloys are identified how?

A

DD and two raised dashes

260
Q

How is 7050 designated?

A

With an E and raised circle

261
Q

How is Corrosion resistant steel designated?

A

No markings on the head and with the letter F

262
Q

When are Monel rivets used?

A

Instead of CRES When their lower shear strength is not a cause of damage

263
Q

What are Monel rivets identified with?

A

Two recessed dimples in their head, M

264
Q

What are titanium rivets?

A

Cylindrical or partially tapered shank

265
Q

Is heat treatment titanium rivets heat treated?

A

No

266
Q

How are titanium rivets identified?

A

Raised T or V

267
Q

What requires access to both ends?

A

Conventional solid shank rivets

268
Q

What requires access to one side?

A

Special or blind rivets

269
Q

What are pop rivets?

A

They’re never used for structural repairs

270
Q

What are pop rivets known for?

A

They’re useful for lining up holes

271
Q

What were cherry friction locks’ styles?

A

Hollow and self plug in

272
Q

What are cherry friction lock rivets two head styles?

A

Universal and 100 degree

273
Q

When a friction lock is used to replace a solid rivet how much larger must it be in diameter?

A

1/32

274
Q

What are mechanical lock rivets designed to do?

A

To prevent the centre stem of the rivet from falling out

275
Q

What is the difference between friction lock and mechanical lock rivets?

A

Mechanical lock rivets permanently locks the stem into place

276
Q

What are Huck loks used for?

A

Structural replacement for solid shank rivets

277
Q

What are Cherry lock rivets?

A

Their centre stem is locked into place with a lock ring

278
Q

What does installation of a cherry lock require?

A

A special pulling tool

279
Q

What’s a disadvantage of cherry lock rivets?

A

If a rivet is too short for application the lock ring sets prematurely resulting in a malformed shank header

280
Q

What do removal of special fasteners involve?

A

Removal of the washer nut or locking collar

281
Q

What do you remove special fastners with?

A

Proper sized box end wrench or vice grips

282
Q

What is a Hi Tigue fasteners?

A

They have a bead that encircles the bottom of the shank

283
Q

What does the bead do in Hi Tigue?

A

It preloads the hole it fills resulting in stronger joints

284
Q

What are taper locks?

A

Strongest. Exerts a force on the conical walls of a hole

285
Q

What are Hi Lites?

A

Same as Hi locks but made from a lighter material and has a shorter transition from the thread to the shank

286
Q

What are the benefits of Hi lite?

A

Good strength to weight ratio, weight saving with no loss of strength

287
Q

What do lockbolts conform to?

A

Military standards

288
Q

What are lockbolts used for?What are lockbolts used for?

A

To bond two materials permanently

289
Q

Are lockbolts heavy or leightweight?

A

Leightweight

290
Q

What are three types of lockbolts used in aviation?

A

Pull type
Blind type
Stump type

291
Q

How do you fit a Hi lok bolt?

A

The hole is first drilled with an interference fit, the Hi Lok is then tapped into the hole and a shear collar is installed

292
Q

What do Hi lok bolts withstand?

A

Bearing and shearing loads

mod 6 (12 decks)

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