Vermont Gage 301000000 Thread Plug Gage 5/16-32 Unef 2B

Product Description

The VERMONT GAGE 301000000 is a NoGo (Minus) Taperlock thread plug gage designed to inspect the pitch diameter and functional thread of internally threaded workpieces. Built to the 5/16-32 UNEF 2B thread specification, this gage confirms that a threaded hole does not accept an oversized thread form, serving as the rejection boundary in a standard Go/NoGo inspection routine. Each unit is supplied with a certificate of accuracy and is marked with nominal size, threads per inch, class of fit, and pitch diameters. Machinists, quality technicians, and inspection departments use this gage in production and incoming inspection environments.

This gage is intended for inspecting 5/16-32 UNEF 2B internal threads - a fine-pitch unified thread form commonly found in precision fastener assemblies, instrument housings, and close-tolerance mechanical components. The Taperlock handle design allows the gage member to be mounted in a standard Taperlock-style handle, which is purchased separately. It is suited for shop-floor and inspection-room use wherever 5/16-32 UNEF internal thread quality must be verified against a defined tolerance class.

Key Features

• NoGo (Minus) member checks that pitch diameter does not exceed the maximum material condition limit
• Taperlock shank design for use with compatible Taperlock handles
• Marked with nominal size, threads per inch, class of fit, and pitch diameters for traceability
• Supplied with a certificate of accuracy
• Optional single line of additional marking (up to 25 characters) available at no added cost

Compatibility

Designed for use with standard Taperlock-style gage handles sized for 5/16-inch gage members. Fits into any inspection workflow requiring Go/NoGo verification of 5/16-32 UNEF 2B internal threads.

Installation Notes

Thread plug gages are installed and used by machinists and quality control technicians. Insert the gage member securely into a compatible Taperlock handle before use. The NoGo member should not enter a conforming threaded hole; if it does, the part is out of tolerance and must be rejected. Handle gages carefully to avoid drops or impacts that could alter the gage surfaces and compromise inspection accuracy.