Vermont Gage 361117540 Threaded Ring Gage 8-32 Unc No Go

Product Description

The VERMONT GAGE 361117540 is a single-ring threaded ring gage designed to verify the No Go condition on external threads. It checks that a machined or threaded part does not exceed the maximum material limit for its thread class, ensuring dimensional conformance before parts move to assembly or inspection. Built from tool steel, this gage is sized for the 8-32 thread form in Unified National Coarse (UNC) configuration and is classified to Class 3A tolerance — the standard for high-quality fastener and precision threaded components. Manufactured and calibrated to NIST-traceable standards, it gives machinists and quality technicians a reliable, direct reference for go/no-go thread inspection.

This gage is used in machine shops, production floors, and quality inspection stations where external thread verification is required. The 8-32 UNC thread size is common in light-duty fastener applications across instrumentation, electronics enclosures, and precision mechanical assemblies. Class 3A designation makes this gage appropriate wherever tight thread tolerances and close fits are specified. It is a single-ring design, covering the No Go function only, and is typically used alongside a separate Go ring gage to complete a full two-gage thread inspection routine.

Key Features

• No Go ring gage confirms external thread does not exceed maximum material condition for Class 3A tolerance
• 8-32 UNC thread form suits a wide range of precision fastener and instrument applications
• Tool steel construction provides wear resistance for repeated production use
• NIST-traceable calibration standard supports traceability requirements in quality management systems
• Single-ring format allows pairing with a dedicated Go gage for full thread inspection coverage

Compatibility

Designed for inspection of external 8-32 Unified National Coarse (UNC) threads to Class 3A tolerance. Intended for use with corresponding Go ring gages and thread plug gages in standard two-gage external thread inspection setups.

Installation Notes

Thread ring gages are precision inspection tools and should be handled by qualified machinists or quality inspection personnel. Store gages in a protected case away from other tooling to prevent surface damage. Before use, clean the gage and the part thread of chips, cutting fluid, and debris. Never force a No Go gage onto a thread — if it engages freely, the part is out of tolerance and should be rejected.