Vermont Gage 301000000 Taperlock Thread Plug Gage

Product Description

The VERMONT GAGE 301000000 is a Go (Plus) Taperlock Thread Plug Gage designed to inspect the pitch diameter and functional thread of internal threaded products. Built to the 5/8-11 UNC thread form and rated for Class 2B and 3B fits, this gage gives machinists, quality technicians, and production inspectors a reliable, fast method for verifying that internally threaded workpieces meet dimensional requirements. The Go member has a length of 0.875 inches and a pitch diameter of 0.566 inches. Each gage ships with a certificate of accuracy and is permanently marked with nominal size, threads per inch, class of fit, and pitch diameters.

This thread plug gage is suited for use in machine shops, manufacturing facilities, and quality-control departments where 5/8-11 UNC threaded components are produced or received. It is compatible with standard Taperlock-style gage handles, making it easy to integrate into existing inspection setups. The Go (Plus) designation indicates the gage is used to verify that the thread accepts the functional go member, confirming proper pitch diameter and thread form on Class 2B and 3B internal threads.

Key Features

• Inspects pitch diameter and functional thread form on 5/8-11 UNC internal threads
• Rated for Class 2B and 3B fits in a single Go (Plus) member
• Go length of 0.875 inches for efficient thread engagement
• Go pitch diameter of 0.566 inches marked directly on the gage
• Includes certificate of accuracy with each unit
• Accepts one line of custom marking up to 25 characters at no additional cost
• Taperlock design for use with standard Taperlock gage handles

Compatibility

Designed for use with standard Taperlock-style thread plug gage handles sized for 5/8-11 UNC thread plug members. No specific handle part numbers were provided in the product data.

Installation Notes

Thread plug gages are typically used by quality technicians and machinists following standard inspection procedures. Insert the Go member fully into the threaded bore without forcing; the member should pass through freely on a conforming part. Do not apply excessive torque or use the gage as a driving tool, as this will damage the thread form on both the gage and the workpiece. Periodic gage calibration and handling care are required to maintain measurement traceability.