P/W Hardware Flashcards
(21 cards)
Torque values for aircraft bolts normally consider
The threads to be clean and dry .
Unless otherwise specified or required, aircraft bolts should be installed so that the bolthead is
upward , or in a forward direction .
A fiber-type, self-locking nut must never be used on a aircraft if the bolt is
Subject to rotation.
Self -locking nuts may be used on a aircraft provided that
the bolt or nut is not subject to rotation
The society of Automotive Engineers (SAE) and the American Iron Steel Institute use a numerical index system to identify the composition or various steels. In the number ‘4130’ designating chromium molybdenum steel , the first digit that indicates the
Basic Alloying Element
which is an acceptable safety device for a castle nut when installed on secondary structures ?
Cotter Pin
When Installing a castle nut, start alignment with the cotter pin hole at the
minimum recommended torque plus friction drag torque
Refer to Figure 42.) Which of the bolthead code markings shown identifies an AN corrosion resistant steel bolt
-3
when used in close proximity to magnetic compass, cotter pins are made of what material
Corrosion resisting steel
Aircraft bolts with a cross or asterisk marked on the bolted are
standard steel bolts
When a fiber to nylon insert-type self-locking nut can be threaded on a bolt or stud through the insert with only the fingers , it should be
rejected
Which statement regarding aircraft bolts is correct ?
In general , boltgrip lengths should equal the material thickness.
Generally speaking , bolt grip lengths should be
equal to the thickness of the material which is fastened
When the specific torque value for nuts is not given , where can the recommended torque value be found ?
AC 43.13-1B
A Particular component is attached to the aircraft structure by the use of an aircraft bolt and a castle tension nut combination . If the cotter pin hole does not align within the recommended torque range by no more than 10 percent .
Change washers and try again
How is clevis bolt used with a fork-end cable terminal secured?
with a shear nut tightened to a snug fit, but with no strained imposed on the fork and the safetied cotter pin
Where is AN clevis bolt used in an airplane ?
only for shear load applications
a bolt with an X inside a triangle on the head is classified as an
NAS close Tolerance bolt
Aircraft bolts are usually manufactured with a
Class 3 fit for the threads
How is the locking feature the fiber -type locknut obtained
by the use of an unthreaded fiber locking insert
