AMT Hardware Flashcards
1
Q
A
AN804
Bulkhead Tee,
Bulkhead on run
2
Q
A
AN806
Pressure Plug
3
Q
A
AN814
Bleeder Plug
4
Q
A
AN815
Union
5
Q
A
AN816
Pipe to 37⁰ Flare,
Straight
6
Q
A
AN818
Tube Nut
7
Q
A
AN821
90⁰ Elbow
8
Q
A
AN standard steel bolt
9
Q
A
AN standard steel bolt
10
Q
A
AN standard steel bolt
11
Q
A
AN standard steel bolt (corrosion resistant)
12
Q
A
AN standard steel bolt
13
Q
A
AN standard steel bolt
14
Q
A
AN standard steel bolt
15
Q
A
AN standard steel bolt
16
Q
A
Special bolt
17
Q
A
Special bolt
18
Q
A
Drilled head bolt
19
Q
A
Special bolt
20
Q
A
NSA Close tolerance bolt
21
Q
A
Aluminum alloy (2024) bolt
22
Q
A
Magnetically Inspected
23
Q
A
Orange-dyed magnetically inspected
24
Q
A
Clevis bolt
25
Reworked bolt
26
Low strength material bolt
27
What is the purpose of standards?
- Hardware meets or exceeds specs
- Stays consistent to same reference point
- Creates trust, integrity on regulated products
28
AN
Airforce Navy
29
MS
Military Standard
30
NAS
National Aerospace Standards
31
SAE
Society of Automotive Engineers
32
AMS
Aeronautical Material Specification
33
MIL
Military Specification
34
AN bolt length sized in ____increments
1/8"
35
AN bolt diameter sized in ____ increments
1/16"
36
Combined washer height/thickness can be no more than ____
1/8"
37
IPC
Illustrated Parts Manual
-Lists the specific part numbers of hardware required for relevant installation
38
STC
Supplemental Type Certificate
-A civil aviation authority-approved major modification or repair to an existing type certified aircraft, engine or propeller.
39
What two standards combined to make AN standards?
AS-American standard
| UN-Unified National
40
Sharp V
41
Whitworth
| -55⁰ angle
42
Buttress
43
Square
44
ACME
45
Worm
46
The body drill size is equivalent to ____ of a thread
Major diamater
47
The inside diameter of nut is equivalent to the ____of a thread
Minor diameter
48
Class 1 is a _____thread fit
Loose
49
Class 2 is a ____ thread fit
Free
50
Class 3 is a ___thread fit
Medium
51
Class 4 is a ___thread fit
Close
52
Class 5 is a ___thread fit
Tight
53
Major diameter
54
Pitch diameter
55
Minor diameter
56
Angle
57
Root
58
Crest
59
Pitch
60
If the PN is M10 for a metric thread that means:
The major diameter is 10 mm (milimeters)
61
Metric threads have a _____angle
60⁰
62
The pitch of a P/N M10x1.0 is
1.0 mm
63
AN bolt are what thread standard?
National Fine
64
National Fine thread standards are typically for ____requirements
High torque
65
National Coarse threads are typically used for _____ requirements and lower cycling loads.
Lower torque
66
AC strength can reach _______as compared to hardware at only 55,000 psi
125,000psi
67
A/C hardware is _____plated as compared to regular hardware which is not plated
Cadmium
68
A/C hardware is _____ whereas hardware is not.
Certified/approved
69
True or false, AC hardware cannot be traced
False. By having special standards and regulations, aircraft hardware is traceable and therefore holds its integrity as a reliable product.
70
Bolt diameter at 1/16" increments is slightly ____ than nominal
Less
71
Bolt length at 1/8" increments is slightly ____ than nominal
More
72
In bolt AN4-4A, A stands for what?
A is absent hole from shank of bolt.
73
In AN4H-4A, H stands for what
H is hole in head of bolt, A is absent hole from shank
74
What does DD indicate in bolt naming?
Aluminum
75
In AN17, what does 17 mean?
Close tolerance bolt
76
AN73-4, 7 indicates what
Engine bolt
77
AN24, 2 indicates
Clevis bolt
78
P/N MS-20004 to MS-20024 is what
Internal Wrenching bolt
79
What special requirement for an internal wrenching bolt?
A special countersunk washer is required (MS20002C)
80
What is unique about an internal wrenching bolt? (MS20002)
It has a radius between shank and head to prevent stress risers from a sharp edge. A corresponding washer to that radius is required as well.
Also has 160,000 psi tensile strength, used for high load areas such as wing attachments.
81
Internal wrenching bolt
-Look for radius at head
82
Identify
AN Aircraft Navy
- 17 = close tolerance
- 3 = diameter in 1/16"
- 10 = length in 1/8 (1")
83
Identify
AN Aircrat Navy
- 7 is engine bolt
- 3 is diameter in 1/16
- 4 is length in 1/8
- fine thread
- If an A after,(AN73A-4) = COARSE
84
12 point washer head bolt
85
Flush head bolt
86
What is the torque measurement for metric bolts
Meters or deca-newtons
87
Wrench size for AN5 bolt diameter
1/2
| 5/16 add 3/16 = 8/16 to 1/2
88
Wrench size for 3/8 AN6
9/16
6/16 add 3/16 = 9/16
89
With bolt installation:
- Washer like surface material
- Grip length same as joined material thickness
- Install as per MM, SID, STC, AD
90
If grip length is too long for materials joining you should
Use washer or smaller bolt.
91
All bolt heads and LH threads installed:
Up, forward and outboard
92
Drill hole for bolts, loose fit is
Larger than bolt shank by .002 to .005
93
Drill goles for bolts, push fit is
Reamed to fit, allows bolt to be installed with steady hand pressure
94
Drill holes for bolts, tight drive fit is
Installed with a few blows of a hammer
95
Drill holes for bolts, interference fit is
Bolt diameter is larger than hole, hole is heated, bolt is chilled prior to installation.
96
Clevis bolt
97
Eye bolt
98
Jo bolt
99
Lockbolts
100
Hi lok
101
What class fit is a nut
Class 3
102
What two types of nuts are there?
Self locking and non self locking
103
Non self locking nuts
104
True or false, self locking nuts must be used on parts subject to rotation
False. They must NOT.
105
Can you install a self locking nut above a turbine engine inlet?
No, it could fall off into the turbine engine inlet and become a big problem.
106
True or false. Self-locking nuts should be installed on components that are routinely disassembled.
False.
107
Nylon locking nuts must not be used
In engine compartments or electrical terminals, they will melt from high heat.
108
Each removable fastener must incorporate two retaining devices IF the loss of such fastener would preclude what?
Continued safe flight and landing
109
Fasteners and locking devices must not be adversely effected by what?
Environmental conditions associated with particular installation
110
No ______ nut may he used on any bolt subject ti rotation in operation unless non-friction locking device is used in addition to the _____device
Self-locking
111
If the inside diameter of a nut is .216, according to the table, it is a what?
A 1/4" -28 nut
112
AN310 CASTLE NUT
113
AN320 SHEAR CASTLE NUT
114
AN315 PLAIN NUT
115
AN316 CHECK NUT
116
AN340 MACHINE SCREW NUTS
117
AN345 MACHINE SCREW NUT
| FINE
118
AN355 SLOTTED ENGINE NUT
119
AN360 PLAIN ENGINE NUT
120
Palnut
121
In safety of nylon self locking nuts, how many threads must show
1 to 3
122
What temperature do nylon self locking nuts work below
250⁰F
123
Do not use a nylon self locking nut if
It has no drag
124
If more then 3 threads showing, there is danger of nut thread ____
Bottoming out on bolt shank
125
AN365 NYLON LOCK NUT
126
AN365-428A, A means
Non-metallic insert
127
AN465-428C, C means
All-metal locknut
128
AN364 LOW PROFILE NYLON LOCK NUT
129
A self locking castle nut with nylon insert provides additional or double what
Safety
130
AN363 AND MS21042 HIGH TEMP LOCK NUT
131
What is swaged?
To reduce or taper by forging or squeezing.
132
Plain washer
133
Large area washer
134
Split lock washer
135
Shake proof lock washer
136
High strength washer
137
High strength countersunk washer
138
Washer AN960
Cadmium plated steel washer
139
Washer AN960C
C means corrosion resistant steel
140
Washer AN960B
B is brass
141
Washer AN960D
D is aluminum alloy
142
Washer AN960PD
PD anodized aluminum alloy
143
Washer AN960-416L
L=Light 1/2 thickness
| -used for lining up cotterpin hole to castellated nut
144
Two types of machine screws
Structural and non structural
145
Pan head
100⁰ countersink
Washer head
Filister head
146
147
Two types of screw points
Sharp points (gimlet) and blunt points (various)
148
Two-lug anchor nut
149
One lug anchor nut
150
Corner anchor nut
151
Right angle anchor nut
152
High temperature two-lug anchor nut
153
Two lug floating anchor nut
154
Instrument nut
155
Anchor type tinnerman nut
156
U type tinnerman
157
Cotterpins are measured in length how?
By the shortest leg
158
Tapered pins are used in shear loaded joints where absence of ____is essential
Play/movement
159
When choosing a bolt:
Grip length = joined material thickness
Washer under nut
Safety, 1 to 3 threads showing after engagement
160
# Choose proper hardware
.250 hole
Total material thickness is 1.315"
Use general purpose AN bolt
Use castellated nut, washer and cotterpin
```
AN4-16 bolt
AN960-416 washer
AN310-4 nut
AN380-2-2 cotterpin
MS24665-132 Cotterpin
```
161
# Choose proper hardware
.375 hole
Total material thickness is 2.500"
Use regular AN bolt
Use nylon lockout, with plain washer
AN6-31A Bolt
AN960-616 washer
AN365-624A Nut
162
Fittings
Uses familiar UNF thread, non-tapered thresd design, seals angled mating surfaces
Tube thread
163
Fittings
Uses NPT thread, tapered thread design, seals on tapered threads
Pipe thread
164
Fittings
37⁰ chamfer, coarse thread, blue or black in color. Accepted in aviation maintenance.
AN Fittings
165
30⁰, gray or yellow in colour, finer thread, not accepted
AC Air Corp
166
These fittings go through structure and bulkheads, boss o-rings installed into castings
Bulkhead tube fittings
167
When installing o rings, what indicates a proper fit
O ring is pinched into fitting to prevent leaks, fitting is chamfered so o ring is not cut
168
Tubing is sized by _____ diameter
Outside
169
Flexible hose is sized by
Inside diameter
170
Low pressure tubing
171
Medium pressure tubing
172
High pressure tubing
173
What type of aluminum is used in an A-type aircraft rivet
1100
174
What mark is on the head of an A-type rivet
No mark, plain
175
What type of aluminum alloy is used in am AD type rivet
2117-T
176
What mark is on the head of an AD type rivet
Recessed dot
177
Why are A type rivets not approved for structural use?
Too soft, only used for non structural softer materials
178
What are the two alloys for ice box rivets
2017-T and 2024-T
179
Why are ice box rivets to be kept in sub-freezing temperatures after being heat treated
They age harden at room temperature in minutes
180
What type of aluminum alloy is in B rivet
5056-T
181
What are B rivets used for
Rivet magnesium alloy structures, corrosion resistant traits
182
What type of metal is an F type rivet
Corrosion resistant steel
183
What are F type rivets used for
Riveting corrosion resistant steel firewalls
184
What is an M type rivet made of
Monel
185
What are thebtwo most common rivets
Common solid shank and blind rivets
186
AN for round head rivet
AN430
187
AN number for flat head rivet
AN441
188
AN number for universal head
AN470
189
MS number for universal head rivet
MS20470
190
AN number for 100 degree countersunk rivet
AN426
191
MS number for 100 degree countersunk rivet
MS20426
192
True or false
Pull type lockbolts are equal strength to AN bolts and are difficult to install. They are also lighter
False, they are easy and quick to install.
193
Where can you find the correct hardware part numbers to assemble on certified aircraft?
The Maintenance Manual (MM) and Illustrated Parts Catalog (IPC)
194
What is the most common head marking on am AN standard bolt?
A raised dash or asterisk
195
What class fit are AN bolts and Nuys manufactured with?
Class 3, medium fit
196
Aircraft nuts can be divided into 2 types, what are they?
Self-locking and non-self-locking
197
Where should self-locking nuts NOT be used?
- Parts subject to rotation
- Where they can fall into an engine inlet
- On access panels routinely disassembled
198
What type of bolt installation for a castle nut?
With a drilled shank bolt in a shear load only
199
Hardware required for a .250 diameter hole joining two pieces of aluminum 1.315". What is the bolt, castellated nut, washer and cotterpin?
AN4-16 bolt
AN960-416 washer
AN310-4 nut
AN380-2-2 cotterpin
