Vermont Gage 361000000 Thread Ring Gage Set 7/8-20 Unef

Product Description

The VERMONT GAGE 361000000 is a Go/NoGo thread ring gage set designed to inspect pitch diameter and functional thread on externally threaded products. Built to 7/8-20 UNEF 3A specifications, this set gives machinists and quality control inspectors a reliable pass/fail check at the thread form level. The Go ring gage has a pitch diameter of 0.8425 inches and the NoGo ring gage has a pitch diameter of 0.8392 inches, each with a gage length of 11/16 inches. Each set ships with a certificate of accuracy. All rings are permanently marked with nominal size, threads per inch, class of fit, and pitch diameters.

This gage set is used in manufacturing, machine shops, and inspection environments where externally threaded fasteners, fittings, or components must conform to 7/8-20 UNEF 3A thread class requirements. Typical users include quality assurance technicians, machinists, and tool and die professionals performing in-process or final inspection on threaded parts. The compact ring form allows quick checking directly on the production floor or in the inspection lab.

Key Features

• Go and NoGo rings in a single set for complete pass/fail thread inspection
• Go pitch diameter: 0.8425 inches; NoGo pitch diameter: 0.8392 inches
• Both rings feature an 11/16-inch gage length
• Permanently marked with nominal size, threads per inch, class of fit, and pitch diameters
• Supplied with a certificate of accuracy for traceability
• Optional single line of additional custom marking available at no added cost (up to 25 characters)

Compatibility

Designed for inspection of externally threaded products conforming to 7/8-20 UNEF 3A thread class specifications.

Installation Notes

Thread ring gages are handled and used by quality control technicians and machinists. Keep gages clean and lightly oiled when not in use to prevent corrosion and wear. Do not force a ring gage onto a threaded component - apply only hand pressure during inspection. Store in a protective case away from abrasive surfaces to maintain dimensional integrity and extend service life.