Vermont Gage 361117520 Threaded Ring Gage 8-32 Unc 3A Go

Product Description

The VERMONT GAGE 361117520 is a single-ring threaded ring gage used to verify the external thread dimensions of 8-32 UNC fasteners and threaded components to Class 3A tolerance standards. This is a Go gage, meaning it confirms that a mating male thread falls within the minimum acceptable material condition — the thread must pass through the gage to be considered conforming. Made from tool steel for wear resistance and dimensional stability, it is calibrated to NIST-traceable standards. Inspection technicians, quality control personnel, machinists, and precision fastener assemblers use this gage as part of standard thread-inspection workflow in production and field environments.

This gage is suited for inspecting 8-32 UNC external threads in both light and close-tolerance assembly applications where Class 3A fit is specified. Class 3A is the tightest standard class for external unified threads, making this gage appropriate for aerospace, industrial, and mechanical assemblies where precise thread engagement and fit are required. The single-ring design is used exclusively for Go verification and is typically paired with a separate No-Go ring gage to complete a full Class 3A thread inspection set.

Key Features

• Go ring gage confirms 8-32 UNC external threads meet Class 3A minimum material condition
• Single-ring configuration for dedicated Go-function inspection
• Tool steel construction provides long service life and resistance to wear under repeated use
• Calibrated to NIST-traceable standards for reliable, documentable inspection results
• Compact single-piece form — no setup or adjustment required before use

Compatibility

Designed for inspection of 8-32 UNC external threads manufactured to Class 3A tolerance per unified inch screw thread standards.

Installation Notes

Threaded ring gages are handled and stored by quality control and machining professionals — no power tools or electrical shutoff procedures apply. Always clean both the gage and the part being inspected before use to prevent false readings from debris or cutting fluid. Do not force the gage onto a thread; if the Go gage does not turn freely by hand under its own weight, the thread is out of tolerance. Store the gage in its protective case away from impacts and temperature extremes to maintain calibration.