Common Tools and Fasteners Flashcards

Which type of screwdriver bit is required for a Torx fastener?

Answer: Star-shaped (6-point)

Torx fasteners have a 6-pointed star recess that requires a matching star-shaped Torx bit.

A bolt has a tensile strength rating. What does this rating indicate?

Answer: The maximum pulling force before failure

Tensile strength is the maximum axial pulling (tension) force a bolt can withstand before breaking.

What is the primary purpose of a tap wrench?

Answer: Cutting internal threads in a hole

A tap wrench holds and turns a tap to cut internal (female) threads inside a drilled hole.

Which fastener type is designed to be installed from one side without access to the back?

Answer: Pop (blind) rivet

Pop rivets (blind rivets) are designed for one-sided installation where the back of the joint is inaccessible.

A mechanic uses a breaker bar instead of a ratchet. What advantage does the breaker bar provide?

Answer: It provides greater torque leverage without a ratcheting mechanism

A breaker bar's longer handle provides more torque leverage for loosening stubborn fasteners, without the internal ratchet that could flex or break under high loads.

What does 'SAE' mean when referring to wrenches and sockets?

Answer: Society of Automotive Engineers (inch-based sizing)

SAE stands for Society of Automotive Engineers, and SAE tools use inch-based measurements (e.g., 1/4", 3/8").

Which tool is used to measure the outside diameter of a shaft accurately to thousandths of an inch?

Answer: Outside micrometer

An outside micrometer is designed to precisely measure the external diameter of cylindrical objects to 0.001 inch or finer.