Vermont Gage 361137530 Threaded Ring Gage 7/16-20 Unf

Product Description

The VERMONT GAGE 361137530 is a No Go threaded ring gage designed to verify that external threads do not exceed the maximum material condition for 7/16-20 UNF Class 2A thread forms. Manufactured from tool steel, this single-ring gage provides the dimensional integrity and wear resistance required for precision thread inspection in production and quality-control environments. It is calibrated to NIST-traceable standards, making it suitable for use in regulated inspection programs where documented traceability is required. Machinists, quality technicians, and tool-room professionals use this gage as part of a two-gage go/no-go inspection process to confirm thread conformance before parts advance to assembly.

This gage is applied to externally threaded fasteners and components with a 7/16-20 UNF thread form manufactured to Class 2A tolerance. Class 2A is the most widely used tolerance class for general-purpose inch-series fasteners and threaded components in commercial and industrial applications. The No Go gage is used after the Go gage has confirmed minimum material acceptance — if the No Go gage engages the thread, the part is out of tolerance and must be rejected. It is appropriate for use in aerospace, automotive, and general manufacturing inspection stations.

Key Features

• No Go member for Class 2A external thread inspection at 7/16-20 UNF
• Tool steel construction for hardness, wear resistance, and dimensional stability
• NIST-traceable calibration standard for use in documented quality programs
• Single-ring design for straightforward go/no-go workflow integration
• Conforms to UNF thread-form geometry per unified inch screw thread standards

Compatibility

Designed for inspection of externally threaded components with a 7/16-20 UNF Class 2A thread form. Used as the No Go member in a matched threaded ring gage set for unified fine-series external thread verification.

Installation Notes

Threaded ring gages are handled and applied by quality technicians and machinists — no permanent installation is required. Store the gage in its case when not in use to prevent nicks or corrosion that would affect calibration accuracy. Do not force the gage onto a thread; if engagement requires more than hand pressure, the part should be evaluated for burrs or form errors before re-gaging. Gages should be recalibrated at intervals appropriate to usage frequency and in accordance with your facility quality plan.