Fasteners - Bolts, Studs And Screws Flashcards

1
Q

What is the nominal length of a UNF bolt?

A

Under head to screw threads ( i.e. plain shank)

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2
Q

Where should you not use a nyloc nut?

A

Temperatures above 120 degrees C

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3
Q

What is the nominal length of a standard screw or bolt?

A

The overall length of a countersunk screw and the non-threaded portion of a bolt

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4
Q

An AN steel bolt is identified by what marking on the head?

A

An ‘x’

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5
Q

A blind fastener described as external sleeve and internally threaded would be

A

A jo bolt

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6
Q

Studs which have a size larger thread at one end are called

A

Stepped studs

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7
Q

A bolt win a raised dash is

A

Corrosion resistant steel

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8
Q

A dowel will take what loads?

A

Shear

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9
Q

Dzuz fasteners provide

A

Quick release fasteners at inspection panels

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10
Q

The initials U.N.C when related to aircraft bolts stands for

A

Unified national course

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11
Q

A bolt part number AN25C15 when compared to a bolt part number AN 25-15 has

A

A higher resistance to corrosion

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12
Q

An aluminium alloy bolt may be identified by

A

It’s colour (dyed black)

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13
Q

An AN steel bolt is identified by

A

X on head

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14
Q

Rivnuts were originally used for

A

Securing rubber de-icing boots

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15
Q

Fork end fittings on control rod ends should have

A

Bolt heads fitted upwards

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16
Q

A pin in a fork end fitting is subjected to what loading?

A

Shear

17
Q

UNF means

A

Unified fine

18
Q

A clevis bolt in a control cable fork end would be loaded in

A

Shear

19
Q

Threaded rivets (Rivnuts) are commonly used to

A

Attach parts or components with screws to sheet metal

20
Q

Aircraft bolts with a cross or asterisk marked on the bolt head are

A

A standard steel bolt

21
Q

A bolt with a single dash on the head is classified as an

A

AN corrosion resistant steel bolt

22
Q

A bolt with an ‘x’ inside a triangle on the head is classified as an

A

NAS close tolerance bolt

23
Q

Aircraft bolts are usually manufactured with a

A

Class 3 fit for the threads

24
Q

Instrument mounting nuts are

A

Prevented from dropping behind the instrument panel by magnetism
OR
Non-magnetic

25
Q

The length of a clevis bolt

A

Includes the threads but not the head

26
Q

When fitting hylocks

A

Each hylock should be torqued, the torque calculated for each time
OR
The hole should be drilled so it is an interference fit