Fasteners - Bolts, Studs And Screws Flashcards
What is the nominal length of a UNF bolt?
Under head to screw threads ( i.e. plain shank)
Where should you not use a nyloc nut?
Temperatures above 120 degrees C
What is the nominal length of a standard screw or bolt?
The overall length of a countersunk screw and the non-threaded portion of a bolt
An AN steel bolt is identified by what marking on the head?
An ‘x’
A blind fastener described as external sleeve and internally threaded would be
A jo bolt
Studs which have a size larger thread at one end are called
Stepped studs
A bolt win a raised dash is
Corrosion resistant steel
A dowel will take what loads?
Shear
Dzuz fasteners provide
Quick release fasteners at inspection panels
The initials U.N.C when related to aircraft bolts stands for
Unified national course
A bolt part number AN25C15 when compared to a bolt part number AN 25-15 has
A higher resistance to corrosion
An aluminium alloy bolt may be identified by
It’s colour (dyed black)
An AN steel bolt is identified by
X on head
Rivnuts were originally used for
Securing rubber de-icing boots
Fork end fittings on control rod ends should have
Bolt heads fitted upwards
A pin in a fork end fitting is subjected to what loading?
Shear
UNF means
Unified fine
A clevis bolt in a control cable fork end would be loaded in
Shear
Threaded rivets (Rivnuts) are commonly used to
Attach parts or components with screws to sheet metal
Aircraft bolts with a cross or asterisk marked on the bolt head are
A standard steel bolt
A bolt with a single dash on the head is classified as an
AN corrosion resistant steel bolt
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
Instrument mounting nuts are
Prevented from dropping behind the instrument panel by magnetism
OR
Non-magnetic
