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Screw Thread Definitions

Definitions

Tap Nomenclature

Quiz #1 - Tap Nomenclature

Basic Thread Terms

Quiz #2 - Basic Terms

Basic Thread Terms - Part 2

Quiz #2 – Basic Terms

The "Major" Diameter of a tap was developed for the Army? *

True

False

The "Minor" Diameter of a tap is? *

The smallest diameter of the resulting thread after tapping.

The largest diameter of the resulting thread after tapping?

The smallest diameter of the tool thread.

The largest diameter of a tool thread.

The "Major" Diameter of a tap is? *

The smallest diameter of the resulting thread after tapping.

The smallest diameter of the tool thread.

The largest diameter of the resulting thread after tapping?

The largest diameter of a tool thread.

The distance from a point on a screw thread to a corresponding point on the next thread, measured parallel to the axis is called? *

The Lead Angle

Angle of Thread

Pitch

Lead

Pitch Diameter

The definition of "Pitch Diameter" for a straight thread is "the diameter of an imaginary cylinder, the surface of which would pass through the threads at such points as to make equal the width of the thread ridge and the width of the thread groove." *

True

False

The Lead always equals the Pitch on a tap? *

True

False

On a "Double Lead" thread, the lead is always __________ to the Pitch? *

Equal

2 times

3 Times

When discussing both the tap and the threaded part… *

The Minor Diameter is the same on both.

The Major Diameter of the tap and the part are equal.

The Major Diameter of the Tap corresponds to the Minor Diameter of the threaded hole.