Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

M6 Materials > Screw Threads + Nuts > Flashcards

Screw Threads + Nuts Flashcards

1
Q

Form

A

Contour crest to crest

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Crest

A

Top of thread, prominent point

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Root

A

Bottom of thread groove

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Flank

A

Slope from root to crest

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Thread angle

A

Angle between flanks

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Major diameter in male

A

Diameter from crest to crest

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Major diameter in female

A

Diameter from root to root

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Minor diameter in male

A

Diameter from root to root

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Minor diameter in female

A

Diameter from crest to crest

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Depth

A

Radial Distance from root to crest

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Pitch

A

Distance from crest to crest

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Lead

A

Distance advanced by the moving body of a mating pair in one complete rotation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Run-out

A

Where the minor diameter increases until it reaches major diameter (flank leading to plain part of screw)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

British standard whitworth characteristics

A

Course, general purpose, 55 degree thread angle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

British Standard Fine characteristics

A
  • Finer than BSW
  • Resists vibration
  • Used on aircraft and vehicles
  • 55 degree thread angle
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

British Standard Pipe characteristics

A
  • Used in couplings
  • Requires more material
  • Have tapered crests
  • 55 degree thread angle
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

British Associations characteristics

A
  • Less than quarter inch diameter
  • Scaled from 0-10 (10 =smallest)
  • Used is small electrical parts
  • 47.5 degree thread angle
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

American National Coarse characteristics

A
  • Flat crest and root

- 60 degrees thread angle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

American National Fine characteristics

A
  • Finer than ANC

- 60 degree thread angle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What are the 3 categories of Unified thread forms and what are their thread angles?

A
  • Unified National Course (UNC)
  • Unified National Fine (UNF)
  • Unified National Extra Fine (UNEF)
  • All have a 60 degree thread angle
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

What tool is used to determine thread form

A

Screw pitch gauge/thread gauge

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

What 3 types of thread are used primarily as transmission threads. Used in screw jacks, lifting tackle and parts of heavy industrial machinery?

A

Square, Buttress and Acme

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

What is unique about Buttress threads?

A

Can only transmit power in one direction

24
Q

Which type of thread is the most common?

A

Symmetrical V thread

25
Q

Where does a screw tighten

A

Into a threaded hole

26
Q

What does Chamfered mean?

A

A Lead has been filed into the thread

27
Q

What must grip length equal when fitting a bolt

A

The thickness of the material

28
Q

Where should bolts be identified from?

A

International Parts Catalogue (IPC)

29
Q

What does the part number break down into?

A

Grip length, diameter, drillings and finish

30
Q

What are bolts identified by other than part number?

A

Code marking

31
Q

How many threads threads are permitted in the hole for materials thicker than 2.4mm?

A

2

32
Q

How many threads are permitted in the hole for materials thinner than 2.4mm?

A

0

33
Q

What is the maximum number of washers that can be used to alter grip length?

A

3

34
Q

Why would you use a waisted stud?

A

It uses less material

35
Q

Which stud provides the most rigidity?

A

Shouldered stud

36
Q

What sort of material is a stepped stud used in and why?

A

Soft materials due to increased Anchorage

37
Q

What 3 factors are studs categorised by?

A
  • Tread type
  • Diameter
  • Overall length
38
Q

What are the 3 methods of fitting a stud

A
  • Stud box
  • Stud insertion tool
  • Lock nuts
39
Q

What are the 3 methods of removing a stud?

A
  • Lock nut
  • Filing flats and using an appropriate spanner to remove
  • Ezi-outs
40
Q

What type of metal are self tapping screws used for?

A

Thin gauge sheet metal

41
Q

What should self tapping screws not be used as?

A

Replacements for standard bolts and screws

42
Q

What is used to lock down a castle nut?

A

A split pin

43
Q

What is the difference between a castle nut as a shear castle nut?

A

Shear castle nut is used on areas with a lower tensile load

44
Q

Which type of crenellated nut is designed for high temperature areas and is not approved for airframe use?

A

Slotted engine nut

45
Q

Where are wing nuts used and why?

A

Frequently opened areas because they can be tightened and loosened by hand

46
Q

What do plain nuts require to work?

A

Locking devices

47
Q

What is a check nut used for?

A

As a locking device for plain nuts

48
Q

What type of lock does a lock nut create?

A

Friction lock

49
Q

What type of nut has an insert that will melt if used in a high temperature environment?

A

Nyloc stiff nut

50
Q

How does an Oddie nut work?

A

6 springy tongues that are bent inward form a circle with a diameter less than the diameter of the root of the bolt thread, this grips the bolt thread in place

51
Q

How do you tell the difference between an Aerotight and Philidas nut?

A

Aerotight has a vertical cut on the head, Philidas has a Horizontal cut on the head

52
Q

What type of nut is fixed permanently in place?

A

Anchor nuts

53
Q

Where are Anchor nuts used?

A

In areas you can’t get access to where screws need to be removed and refitted on a regular basis, such as panels

54
Q

At what temperature are High temperature self locking nuts used?

A

120 degrees Celsius or higher

55
Q

What is the maximum temperature at which Low temperature self locking nuts used?

A

121 degrees Celsius

56
Q

What metal alloys are High temperature self locking nuts usually used with?

A

CRES, Steel alloy and silver plated CRES

57
Q

What type of self locking nut has it’s threads out of phase?

A

High temperature self locking nuts

M6 Materials (4 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions