6.5 fasteners

Question 1

how do you measure screw thread pitch

Answer 1

screw thread pitch gauge

Question 2

can a screw thread pitch gauge be used on internal and external threads

Answer 2

yes

Question 3

what are the 5 classes of fit

Answer 3

loose
free
medium
close
tight

Question 4

what class is aircraft screws manufactured with

Answer 4

class 2
for ease of assembly

Question 5

what is female thread

Answer 5

internal thread

Question 6

what is a taper thread

Answer 6

when it is formed on a conical part

Question 7

when the thread is anticlockwise is it left or right

Answer 7

left

Question 8

are most screws left or roght

Answer 8

right

Question 9

where are multiple thread screws commonly found

Answer 9

industrial machines
valves
fire hydrants
aircraft landing gear

Question 10

what is the lead

Answer 10

the amount of distance a nut travels in one revolution

Question 11

in a double lead thread does it move 2x the amount as a single thread

Answer 11

yes

Question 12

what is the length increments for aircraft bolt

Answer 12

1/8inches

Question 13

what is diameter increments for aircraft bolt

Answer 13

1/16 inche

Question 14

what is the size range for hex heads

Answer 14

AN3 - AN20

Question 15

what is the bolt length

Answer 15

length from bottom of head to end of bolt

Question 16

what is the grip length

Answer 16

length of unthreaded section

Question 17

unless specified, what material is an aircraft bolt made of

Answer 17

cadmium plated nickel steel

Question 18

what bolt size is forbidden by the faa

Answer 18

aluminium alloy bolts and alloy steel bolts

Question 19

what letter identifies that a bolt has a hole drilled through it

Answer 19

A

Question 20

what load is clevis bolt designed for

Answer 20

shear load

Question 21

what load does eye bolts hold

Answer 21

tension

Question 22

where are close tolerance bolts used

Answer 22

areas subject to pounding loads

Question 23

what symbol identifies a close tolerance bolt

Answer 23

triangle

Question 24

where can nylon self locking nuts not be used

Answer 24

in any location where temp could exceed 121c

Question 25

what is a check nut

Answer 25

a seocnd nut which holds the primary nut in place

Question 26

what are tinnerman nuts

Answer 26

cheap stamped out of sheet metal

Question 27

what are rivnuts used for

Answer 27

attach rubber de-icing boots

Question 28

what is a stud

Answer 28

shaft threaded at both ends

Question 29

what does heli coils do

Answer 29

protects against the wear from continual insertion and removal of bolts

Question 30

what are the most commonly used threaded fastener

Answer 30

screw

Question 31

whats the difference between bolt and screw

Answer 31

screw is mostly made from lower strength materials the thread runs the full length of the screw but bolts usualy have an unthreadded section

Question 32

what are machine screws used for

Answer 32

attaching fairings inspoection plates fluid line clamps light str4uctural parts

Question 33

what class fit does screws usualy have

Answer 33

class 2

Question 34

what are structural screws made of

Answer 34

alloy steel

Question 35

where are self tapping screws used

Answer 35

to hold thin sheets of metal plastic plywood

Question 36

what is a gimlet point on a screw

Answer 36

a sharp point

Question 37

what is a type A screw

Answer 37

has a gimlet point (sharp)

Question 38

what is a dowel

Answer 38

solid cylindrical rod used where precision alignment is used

Question 39

what is a pip pin

Answer 39

non threaded fastener for quick removal of parts without tools works by pressing in a button to remove a ball which locks the pin in place

Question 40

when are lock washers used

Answer 40

when the joint is not structurally criticalw

Question 41

what are lock washers made of

Answer 41

steel

Question 42

how does spring washer work

Answer 42

coil is compressed, creates friction, prevents nut from vibrating loose

Question 43

how does tab washer work

Answer 43

one tab is bent across the flat of the nut cant be used again

Question 44

can you reuse tab washers

Answer 44

no

Question 46

what is a shakeproof washer

Answer 46

steel washer with serrations the serrations prevent the nut from undoing

Question 47

what is the minimum amount of twists per inch for locking wire

Answer 47

6-8 twists per inch

Question 48

where are pal nuts ideal for

Answer 48

ideal for applications where frequent load changes tend to loosen conventional nuts

Question 49

what are the 3 common types of quick release fassteners

Answer 49

dzus airloc camloc

Question 50

whats camloc also referrd as

Answer 50

quarter turn

Question 51

what loads do taper pin withstand

Answer 51

shear loads

Question 52

what is the most common used rivet

Answer 52

solid shank

Question 53

before being driven, how much should the rivet extend the base material by?

Answer 53

1.5x the diameter

Question 54

how to identify if a bolt has a hole drilled through it

Answer 54

A is used in the part code

Question 55

aluminium of 1100 is used for what applications

Answer 55

low strength