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Mod 6 Materials And Hardware > Fasteners > Flashcards

Fasteners Flashcards

0
Q

Define the effective diameter of a bolt

A

-> imaginary line through the middle of the tooth

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1
Q

Define pitch of a thread

A

-> distance from any point of a thread to the corresponding point on the next

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2
Q

Define major diameter

A
  • > distance from root to root on nut

- > distance from crest to crest on bolt

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3
Q

Define Crest

A

-> top surface of thread

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4
Q

Define Root

A

-> Bottom of the groove

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5
Q

define the flank or side

A

-> surface that connects root to crest

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6
Q

Define thread angle

A

-> angle between the flanks

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7
Q

Define Angular Depth

A

-> the triangle formed by the intersection of the extended flanks

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8
Q

Define Actual Depth

A

-> distance between the crest and root measured

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9
Q

Define the fundamental Triangle

A

-> imaginary triangle created from the crest to root to crest

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10
Q

Define Lead

A

-> the distance the screw thread advances axially in one complete turn

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11
Q

Define Class 5 fit

A

-> Tight Fit

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12
Q

Define Class 4 fit

A

-> Close fit

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13
Q

Define class 3 fit

A

-> Medium fit

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14
Q

Define class 2 fit

A

-> Free fit

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15
Q

Define class 1 fit

A

-> Loose fit

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16
Q

Define Square thread

A
  • > square teeth

- > where all dimensions are pitch/2

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17
Q

Define Acme Thread

A
  • > modified square thread
  • > wedge shaped
  • > thread angle of 29 degrees
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18
Q

Define Buttress thread

A
  • > one face at 90 to axis
  • > other at 45
  • > used in quick release bench vices
19
Q

Define Ball screw thread

A
  • > half circle cut outs

- > used in flap drives

20
Q

What is the angle of BA thread

A

47.5 degrees

21
Q

What is the BSW and BSF thread

A

55 degrees

22
Q

what is the angle of UNC, UNF and metric threads

A

60 degrees

23
Q

what is the difference between a bolt and a screw

A 
bolt = has head then shank or grip then thread 
screw = has head then all thread
24
Q

Name the types of stiff nut

A
  • > Oddie
  • > Philidas
  • > aerotight
25
Q

Define the oddie nut

A

-> nut with six tongues on top, diameter of tongues smaller than diameter of thread

26
Q

Describe Philidas Nut

A

-> nut with section on top, that has two horizontal slits that are 270 degree apart

27
Q

Describe Aerotight nut

A

-> nut has circular crown with vertical slot across diamater

28
Q

what are the types of thread inserts

A
  • > helicoil - wire thread

- > thin walled

29
Q

describe helicoil

A
  • > Diamond section wire
  • > wound into spring shaped
  • > with tang
30
Q

Describe Thin walled insert

A
  • > has external and internal thread

- > screws into tapped hole and locked in place with key

31
Q

Describe a ‘pip’ pin

A
  • > quick release pin

- > not used in structural load

32
Q

Describe a Dzus fastener

A
  • > quick release
  • > usually released or locked with a 1/4 turn
  • > slot on the screw fits onto tab in retainer
33
Q

Describe camloc fastener

A
  • > quick release
  • > spring loaded
  • > 1/4 turn
34
Q

describe oddie Fasteneres

A
  • > quick release

- > uses spring clip

35
Q

List the protruding head rivets

A
  • > round or snap
  • > flat head
  • > mushroom
  • > Universal
36
Q

where is the protruding head rivets used

A

-> not used in the airflow

37
Q

list types of flush head rivets

A
  • > 100 degree countersink
  • > 78 degree countersink
  • > 120 degree countersink
  • > double angle (82/30 degrees) fluid tight countersink
  • > briles type countersink
  • > reduced shear head 100 degree
38
Q

Describe ‘pop’ rivets

A

->two types - standard (leave nothing in the gap) break-stem ( leaves bit in gap)

39
Q

describe a chobert rivets

A

-> rivet that uses a mandrel to expand the rivet and a pin can be put in the hole

40
Q

Describe avdel rivets

A

-> similar to pop rivet except inner section remains in place and is milled flush

41
Q

Describe Self plugging rivets

A
  • > Mechanical lock

- > screws rivet into place

42
Q

Describe thread pin fasteners

A
  • > rivet that has a torque off nut head

- >when put inplace the nut is torqued untill the nut head snaps off

43
Q

Describe Blind Bolt rivets

A
  • > has a sleeve on top

- > uses an expander nut

44
Q

Describe Hi-lok

A
  • > bolt with hex recess

- > holding device that is held

45
Q

Describe Rivnuts

A

-> rivet that has a bolt through it that when used the bolt pulls rivet inplace then is removed

Mod 6 Materials And Hardware (10 decks)

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