Vermont Gage 361129530 Threaded Ring Gage 5/16-18 Unc

Product Description

The VERMONT GAGE 361129530 is a No Go threaded ring gage designed to verify the maximum material condition of externally threaded fasteners and components. Manufactured from tool steel, this single-ring gage checks 5/16-18 UNC threads to Class 2A tolerance limits. When a properly machined thread rejects the No Go gage by not fully entering, the thread is confirmed within specification. Machinists, quality control inspectors, and precision manufacturing shops use this gage as part of a go/no-go inspection routine on production parts, tooling, and fastener stock.

This gage is suited for inspection of 5/16-18 UNC externally threaded parts held to Class 2A tolerances, which represent the standard fit used in the majority of commercial and industrial fastener applications. It is commonly used on the shop floor, at incoming inspection stations, and in tool rooms where thread verification is required before parts proceed to assembly. The single-ring design provides a straightforward, handheld inspection method without additional fixtures or equipment.

Key Features

• No Go gage confirms threads do not exceed maximum material Class 2A limits for 5/16-18 UNC
• Tool steel construction provides hardness and wear resistance for repeated inspection use
• Single-ring configuration for fast, handheld thread checking
• Manufactured and calibrated to NIST-traceable standards
• Class 2A tolerance classification covers the most common commercial fastener fit

Compatibility

Designed for inspection of externally threaded components with 5/16-18 UNC thread form held to Class 2A tolerance specifications.

Installation Notes

Threaded ring gages are used by quality control inspectors and machinists — no installation is required. Store the gage in a protective case away from abrasive debris and temperature extremes to maintain calibration integrity. Do not force the gage onto a thread; resistance or binding indicates the thread is out of specification or has damage. Periodic recalibration against NIST-traceable masters is recommended per your quality management system requirements.