Thread pitch gauge

Gauge for measuring screw thread pitch or lead

Please visit our website for more information on this topic.

"Screw gauge" redirects here. For the type of micrometer, see Micrometer screw gauge

A thread gauge,[1] also known as a screw gauge[2] or pitch gauge[3] is used to measure the pitch or lead of a screw thread.

Thread pitch gauges are used as a reference tool in determining the pitch of a thread that is on a screw or in a tapped hole. This tool is not used as a precision measuring instrument, rather it allows the user to determine the profile of the given thread and quickly categorize the thread by shape and pitch. This device also saves time, in that it removes the need for the user to measure and calculate the pitch of the threaded item.

Usage

To use a thread gauge, the user must first match the type of thread to the gauge. 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. If the teeth (cut into the leaf) match the spacing of the thread, then the user can read off the thread pitch stamped into the leaf. If the fit is not good, the user should try a different leaf.

Note that this tool is not for accurate measurement of an unknown thread, such as a hand-turned thread from a lathe. This tool is meant for a best-approximation measurement to a known thread standard.

See also

References

Recent advancements in thread pitch gauges have focused on improving their material and design for enhanced durability and precision. Newer models are incorporating advanced alloys that result in better resistance to wear and tear, ensuring that they maintain their measuring capabilities for a longer duration. For those interested in specific thread types, such as Unified or Metric threads, there are also tailored gauges available that meet the highest industrial standards.

For more comprehensive usage guidance, check out the detailed instructions available on RTP GAUGE and don’t hesitate to visit our FAQ section if you're looking for information on alloy metric gauge.