Aircraft Hardware Flashcards
Before the rivet is actually driven, the actual distance the rivet must extend out of the material is by:
1.5 x Diameter
AMS rivet stands for
Aeronautical Material Specs
AND rivet stands for
Air-force Navy Design
AS rivet stands for
Aeronautical Standard
ASA rivet stands for
American Standards Association
ASTM rivets stands for
American Society for Testing Materiels
NAS rivets stands for
National Aerospace Standard
SAE rivets stands for
Society of Automotive Engineers
Rivets are designed to withstand ________ stress
shear
Universal Head number
470
Countersunk Head number
426
The process of cutting away metal on top of sheet metal for using 426 rivets is termed:
countersinking
The mechanical denting of sheets to be joined together is termed:
dimpling
The reason why gusset driving energy would be lost
Full contact with rivet head is not made
470E
Alloy 7050 Zinc
470D
Alloy 2017 Copper
470A
Alloy 1100 Aluminium
470DD
Alloy 2024 Copper
470B
Alloy 5056 Magnesiunm
470AD
Alloy 2117 Copper
Rivet with two recessed dimples in the head
470M
Alloy Monel
Identify
Pop rivet
Identify the catagory of hardware
Mechanical lock rivets
Identify
CherryMax rivet
Identify
Stump-type Lockbolt
Identify
Pull-type Lockbolt
Identify
Blind-type Lockbolt
The location where Rivnuts are typically located
Deicing boots
Aircraft bolts, screws and nuts are threaded in
- American National Course
- American National Fine
- American Standard Unified Course
- American Standard Unified Fine
The 5 classes of fits for threads
- Class 1- loose fit
- Class 2- freee fit
- Class 3- medium fit
- Class 4- close fit
- Class 5- tight fit
Differnce between Class 1 and Class 5 fit of threads
Class 1 can be tightneded by hand,
Class 5 requires tools from start to finish
Threaded fasteners diameters are given in
1/16 inch
Threaded fasteners lengths are given in
1/8 inch
If the length of a bolt is greater than one inch, the code identification is given
with two numbers for length, the first being the whole number in inches
the second being the fraction assumed in 1/8
Identify
- Head
- Grip
- Point
- Grip length
- Thread length
- Length
Unless otherwise specified, an aircraft bolt is made of
cadmium-plated nickel steel
The letter “C” in between the bolt diameter and length indicate
Corrosion resistant steel
The letters “DD” in between the bolt diameter and length indicate
Aluminium alloy
Identify the types of hardware:
AN4-6
AN4C6
AN4DD6
- Cadmium plated nickel steel 4/16 dia, 6/8 lgt
- CRES 4/16 dia, 6/8 lgt
- Aluminium 4/16 dia, 6/8 lgt
The FAA forbids the use of aluminium alloy and steel alloy bolts smaller than_____ on structural components
AN3
When the letter “A” appears after the bolt dash number
This letter indicates that the bolt does not have a hole in the shank
When the letter “A” DOES NOT appear after the bolt dash number
The absence of this letter indcates that the bolt has a hole in the shank
A bolt such as those used for fastening propellers into flanged shafts have “_” after the dash number on the bolt code and this signifies that
“H”
The bolt has a drilled head for safetying
The tolerance that Close Tolernce bolts have
+0.000”, -0.0005”
What must be doen to a close tolerance bolt prior to installation
Shank is Lubricated with grease to provide some degree of corrsion protection since the tolerence is so tight
The type of bolt ONLY used for shear loads
Clevis bolts
Typical application of Clevis bolts
Control cable installations
What the grip length of a bolt must be equal to
The material thickness
The common practice for when the grip length of a bolt is greater than the material’s thickness
Addition of washers
The direction that a bolt should not be installed in unless otherwise specfied
upside down
Never assume that a control cable is clear of a bolt until
The bellcrank has been inspected for full travel
Identify
- Control surface
- Bellcrank
- Cable
Identify
Close Tolerance Bolt
Identify
Clevis Bolt
Identify
Wing nut