Thread pitch gauge

This device also saves time, in that it removes the need for the user to measure and calculate the pitch of the threaded item.

For example, attempting to measure metric threads with an imperial gauge will not return accurate results.

To determine the correct gauge, a process of trial and error may be needed if the screw is of unknown origin.

Once the correct gauge is determined, the user should extend one of the leaves of the tool and press it against the threaded portion of a screw.

This tool is meant for a best-approximation measurement to a known thread standard.

Three different sets of threading gauges. The uppermost gauge is an ISO metric pitch gauge, the larger gauge in the center is for measuring the Acme thread form , and the lower gauge is for Whitworth screws.
Thread pitch gauge against a screw thread
Usage of a thread pitch gauge