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Can you substitute hardware from one standard with another standard?


Always purchase parts from a _________ source


Aircraft parts must be _________

National Coarse

NC is also known as ________ ____

National Fine

NF is also known as American ________ ____

Unified Coarse

UNC is also known as American standard ________ ______

Unified Fine

UNF is also known as American standard ________ ____


Class 1 is a _____ (Free/Loose) fit


Class 2 is a _____ (Close/Free) fit


Class 3 is a _____ (Close/Medium) fit


Class 4 is a _____ (Close/Tight) fit


Class 5 is a _____ (Tight/Free) fit


When stresses combine it is called __________ stress


When installing a bolt, you have to ensure that the ____ length is correct

Hex Head

What bolt is this?

Tension, Shear

Hex head bolts take these two kinds of loads


Tension, Torsion, Compression, Shear are examples of what?

Hex Head

Which bolts can be made of cadmium plated nickel steel, aluminum, and corrosion resistant steel? (Hex Head/Eye/Clevis)


How many letters can you have before the dash number
on a Standard AN bolt?

Corrosion Resistant Steel

What does C stand for?


What does D or double D stand for?

Drilled Head

What does H stand for?

Air Force, Navy

AN stands for ___ _____ / ____ standards

National Aerospace

NAS stands for ___________ ___________ standards


MS stands for _________ standards


Clevis bolts are used only on ______ load applications


Right hand thread tightens down with a ________________ (clockwise/counter-clockwise) movement


Left hand thread tightens down with a ________________ (clockwise/counter-clockwise) movement

Cadmium Plated Nickel Steel

A star or cross on the head means that the bolt is made of what?

Corrosion Resistant Steel

A line on the head means that the bolt is made of what?


Two lines on the head of a bolt means it's made of what?

No hole

An A at the end means what about a bolt?

3/8, 7/8

Referring to "AN6-7", what measurement is 6 and what is 7? (simplify the fractions)

Up, Forward

Where should a bolt be facing when installed? (Hint: two directions)


How many washers can be used?


What is the washer touching the surface of the material the bolt is being bolted onto for?

1 to 3

How many threads are allowed to show out of a nut?


How many threads are allowed to show inside the material?


What kind of bolt is used when freedom of movement is necessary?

Eye Bolt

This bolt is used for external tension loads

Eye Bolt

This bolt is designed for attachment of devices like the fork of a turnbuckle and a cable shackle.

Shear Nut

What is a clevis bolt secured with? (Hint: Uses the same word as what load a clevis bolt can take)

Clevis Pin

This pin is for shear loads only

Close Tolerance

What does a triangle mark on the head of a bolt mean?

Close Tolerance Bolt

This bolt is used in areas where it is subject to pounding loads and where structure is required to be riveted and bolted

Fine, 3

Aircraft Bolts are usually ____ threaded in a class ___ fit

Direction Of Rotation

For helicopters, bolt heads are installed in the __________ _____ ___________


2 basic types of _____ are self locking and non self locking


Nuts can be made of D/DD, C, (-), and B. What is B?


What is the castle nut you need to remember?


What class fit is AN310?

Wing Nut

What is this nut?

Wing Nut

What nut is used when frequent installation and removal is needed?

Engine Nut

AN355 and AN360 are what kind of nut designed for use on engines and not on airframes?

Self Locking

Low temperature and high temperature are examples of what kind of nut?


Low temperature nuts can be used for up to how many degrees fahrenheit?

Nylon, Fiber

What materials are used for low temperature nuts? (Hint: There's two)

Anchor Nuts

What kind of nuts are used for areas with no access? (Hint: held in place by rivets or clips)

Tinnerman Nuts

These nuts are economical and lightweight, are for self tapping screws and non-structural installations.


These nuts are commonly available with flat heads and with 100 degree countersunk heads


How is corrosion resistant steel designated?

Class 3

Non self-locking nuts are usually what type of fit?


How is a wing nut safetied normally?


Where can you not use engine nuts?

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