Vermont Gage 361133030 Threaded Ring Gage 3/8-16 Unc

Product Description

The VERMONT GAGE 361133030 is a single-ring threaded ring gage manufactured from tool steel and used to verify the maximum material condition of external threads. Classified as a No Go gage to the Class 2A tolerance standard, it checks that a threaded workpiece does not exceed the upper limit of the allowable thread form. The 3/8-16 UNC thread designation covers a common unified coarse pitch thread found throughout general mechanical and structural fastener applications. This gage is calibrated to NIST-traceable standards, making it suitable for quality control environments where documented traceability is required. Machinists, quality technicians, and tool room professionals use this instrument as part of a go/no-go inspection routine.

This gage is used on external 3/8-16 UNC threaded parts in production, incoming inspection, and job shop environments. The No Go ring gage is applied after the Go gage passes; a conforming part should not fully engage the No Go gage. It is well suited for inspecting bolts, studs, threaded rod, and machined shafts where Class 2A fit tolerances are specified. Typical applications span general manufacturing, maintenance shops, and fabrication facilities working to standard UNC fastener specifications.

Key Features

• No Go classification verifies external threads do not exceed Class 2A upper tolerance limit
• 3/8-16 UNC thread form for common unified coarse pitch inspection
• Single ring design for straightforward go/no-go inspection workflow
• Tool steel construction for wear resistance and dimensional stability
• NIST-traceable standards compliance supports documented quality control requirements

Compatibility

Designed for inspection of external 3/8-16 UNC threaded components manufactured to Class 2A tolerance specifications.

Installation Notes

Threaded ring gages are used by quality technicians and machinists and require no permanent installation. Keep the gage clean and lightly oiled when not in use to prevent corrosion and maintain dimensional accuracy. Do not force the No Go gage onto a part; engagement beyond hand pressure indicates a measurement or handling error. Store in a protective case away from impact and temperature extremes to preserve calibration integrity.