Hardware/Measuring

Screws and Bolts

100

Screws and bolts are given a part code to designate their diameter in ______ of an inch increments and their length in ______ of an inch increments. 

Diameter: 1/16th of an inch 

Length: 1/8th of an inch 

200

What is the difference between sheet metal screws and machine screws? 

Sheet metal screws: Coarse thread 

Machine screws: Fine thread 

300

What is the number one rule after using nuts to tighten bolts? 

All nuts after tightening must have a safety device. 

400

What is the Grip-Length of a Standard Aircraft Bolt?

The length of the unthreaded portion of the bolt. 

500

What are the four types of pins commonly used in aviation?  

Cotter Pin, Roll Pin, Clevis Pin, Taper Pin  

Rivets

100

Countersunk Rivets are tapered at _______ Degrees. 

100 Degrees 

200

What are Ice Box Rivets? Which alloy designation is Icebox Rivets?

Rivets that are put into a freezer and stored before bucking  2017, 2024 

 

300

True or False, Pop-Rivets are used for structural applications. 

False 

400

 

Breakdown the MS Rivet identification number.  

MS20470AD-4-6 

 MS20:  

 470:  

 AD:  

 4:  

 6:  

 

MS20: Military Specification 

470: Head type (Universal)

AD: Alloy Designation 

4: Diameter in 1/32nds 

6: Length: 1/16th 

500

Tell me which alloy identification goes to what rivet and what each identification letter stands for. 

(EX: B – 5056 - Raised Cross).

D –  

DD –  

A –  

AD –      

 

D – 2017 – Raised Dot 

DD – 2024 – Two Raised Dashes  

A – 1100 – Plain Rivet 

AD – 2117 - Dimple     

Measuring

100

What are thickness gauges and what are they used for?  

Thickness Gages or Feeler Gages, are precision ground steel leaves, used to measure the clearance, or space between parts

200

What are Vernier calipers and what are they used for?  

Vernier Caliper is a precision measuring tool that is used to make inside and outside measurements

300

What are Telescoping Gauges and what are they used for?  

Transfer the size of an Internal Diameter that is then transferred to a Micrometer used     to measure the Telescoping Gage. 

 

400

What are Dial-Indicators and what are they used for? 

A Dial Indicator is a Tool that can Register small movements by using a Needle on a Dial Face. It can be used to measure crankshaft runout, gear backlash, end-play in a shaft or axle, and radial play in such components as turbocharger rotors.

500

Tell me at least three different parts of a micrometer. 

• Frame

• Anvil

• Spindle

• Sleeve or Barrel

• Thimble

• Ratchet Stop

• Lock