AIR 1120 Nuts, Pins & Washers

What are the 2 types of aircraft nuts?

• Self-locking & Non-self-locking

• Self-locking & Plain

• Castle & High heat

• Metal & Fibre lock

What diameter should a cotter pin be?

• The largest size that will fit in the cotter pin hole

• As called out in the AMM

• A direct ratio to the length

• Whatever fits in the cotter pin hole

Special countersunk washers must be fitted to:

• Radius head bolts

• Plain AN bolts

• AN4-9

• Aircraft screw

What kind of aircraft lock washers are there?

• Split, internal & external lock washers

• Split & external lock washers

• Internal & external lock washers

• Plain & fancy lock washers

What do washers provide?

• Smooth bearing surface, spacer/shim or locking feature

• Slippery surface

• Ability to correctly torque

• Locking capability

What method, other than found in the AC43.13 is used to cotter pin?

• Helicopter

• Truck

• Tractor

• Butterfly

How is this nut locked?

• Cotter pin

• Deformation

• Fiber insert

• Lock washer

A bolt with a plus sign or asterisks on its head is a:c

• nickel steel bolt

• corrosion resistant bolt

• aluminum bolt

• close tolerance bolt

Cotter pins can be reused.

• False

• True