Screws Flashcards

1
Q

Name the three types of screws and their differences.

A

Structural, has a grip length.
Machine, has no grip length.
Self tapping, course thread.

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2
Q

What are the two types of point on a self tapper?

A

Type A, gimlet or point

Type B, flat point.

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3
Q

What are structural screws made form?

A

Heat treated alloy steel, can be sued as structural bolts.

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4
Q

Name four head types on self tapping screws.

A

Round head.
Truss head.
Counter sunk, flat head.
Counter sunk, oval head.

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