Homework 3 Flashcards
Match the information
NC
NF
UNC
UNF
NC
American National Coarse
NF
American National Fine
UNC
American Standard Unified Coarse
UNF
American Standard Unified Fine
Match the information
Class 1
Class 2
Class 3
Class 4
Class 1
Loose Fit
Class 2
Free Fit
Class 3
Medium Fit
Class 4
Close Fit
A ______ fit allows you to turn the nut all the way down using nothing but your fingers.
Class 1
A ______ fit requires a wrench to turn the nut down from start to finish.
Class 4
How does a Clevis Bolt look
A round flat head fastener
How does a Close Tolerance Bolt look
A hexagonal head with a triangle shape on the middle
How does a Aluminum Alloy Bolt look
A hexagonal head with two dashes perpendicularly aligned
How does a Corrosion Resistant Steel Bolt look
A Hexagonal Head with a horizontal dash located centered left on the bolt head
How does a Standard Steel / Cadmium Plated Nickel Alloy Steel Look
A Hexagonal Head With a plus sign or asterisk centered on the middle of the head
Give the Diameter of the following bolts
AN4
AN8
AN12
AN16
AN4
1/4
AN8
1/2
AN12
3/4
AN16
1
Give a Length for each of these bolts
AN4-6
AN8-12
AN12-10
AN16-34
AN4-6
3/4
AN8-12
1 1/4
AN12-10
1
AN16-34
3 1/2
Name the bolts that have a hole to accept a cotter pin in the shank:
AN8-12 [ Select ] [“NO”, “YES”]
AN8H-12A [ Select ] [“NO”, “YES”]
AN8-12A [ Select ] [“NO”, “YES”]
AN8H-12 [ Select ] [“NO”, “YES”]
Answer 1:
YES
Answer 2:
NO
Answer 3:
NO
Answer 4:
YES
Which of these bolts has a hole drilled across the flats of its head, through
which safety wire can be passed?AN6-12A [ Select ] [“NO”, “YES”]
AN6H-12 [ Select ] [“YES”, “NO”]
AN6C12A [ Select ] [“NO”, “YES”]
AN6H-12
Answer 1:
NO
Answer 2:
YES
Answer 3:
NO
Answer 4:
YES
Which of these bolts has coarse threads [ Select ]
Answer 1:
AN 75A-44
Which of these bolts would be identified by a triangle around the asterisk
on it’s head?
AN 176-12
Which of these bolts would be approved for a shear load but not for a
tensile load?
AN 26-12
What kind of protection is on the shank of an AN 176-12 bolt?
Answer 1:
Grease
The bolt shanks should be pointed inboard , down , and aft when installed
correctly.
Answer 1:
inboard
Answer 2:
down
Answer 3:
aft
Match the proper AN number with nuts described
aircraft castle nut
shear castle nut
aircraft plain nut
aircraft check nut
wing nut
machine screw nut, fine thread
slotted engine nut
aircraft castle nut
AN 310
shear castle nut
AN 320
aircraft plain nut
AN 315
aircraft check nut
AN 316
wing nut
AN 350
machine screw nut, fine thread
AN 345
slotted engine nut
AN 355
