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 3-48 UNC thread form and compatible with both Class 2B and Class 3B fits, this gage gives machinists and quality control technicians a fast, reliable method for verifying thread conformance. The Go member features a pitch of 0.0855 inches and a gage length of 0.25 inches. Each unit ships with a certificate of accuracy. Markings include nominal size, threads per inch, class of fit, and pitch diameters as standard.

This thread plug gage is suited for use in production and inspection environments where 3-48 UNC internal threads must be verified to Class 2B or 3B tolerance. Typical applications include precision machined components, fastener inspection, and assembly quality control in manufacturing facilities. The Taperlock design allows quick handle changes, making it efficient for high-volume inspection workflows. One line of custom marking up to 25 characters can be added at no additional cost, supporting part traceability and shop floor identification requirements.

Key Features

• Inspects pitch diameter and functional thread for internal threaded products
• Go (Plus) member for Class 2B and Class 3B fits on 3-48 UNC thread form
• Go gage length of 0.25 inches with a pitch of 0.0855 inches
• Taperlock shank design for quick handle interchange
• Supplied with a certificate of accuracy
• Standard markings include nominal size, threads per inch, class of fit, and pitch diameters
• Optional custom marking line up to 25 characters included at no extra charge

Compatibility

Designed for inspection of internal threads conforming to the 3-48 UNC thread form at Class 2B and Class 3B tolerance fits. Compatible with standard Taperlock-style gage handles.

Installation Notes

Thread plug gages are typically used by quality control inspectors and machinists; no power tools or utilities need to be shut down prior to use. Handle the gage carefully to avoid nicks or burrs that could affect measurement accuracy. Store in a protective case away from abrasive materials and temperature extremes to maintain calibration integrity. Re-certification intervals should follow the requirements of the applicable quality management system or metrology standard in use at the facility.