Vermont Gage 361127010 Threaded Ring Gage 1/4-28 Unf 2A Go

Product Description

The VERMONT GAGE 361127010 is a Go-type threaded ring gage designed to verify external thread conformance on 1/4-28 UNF fasteners and components. Built from tool steel, this single-ring gage is used to check that a threaded workpiece falls within the acceptable dimensional limits for Class 2A tolerance. When the Go ring passes freely over a threaded part, the thread form and pitch diameter meet the minimum material condition. This gage is a standard instrument in quality control workflows on the shop floor and in receiving inspection environments. Calibrated to NIST-traceable standards, it delivers reliable, repeatable results for machining and assembly operations.

This gage is used in manufacturing, aerospace, automotive, and general fabrication settings where 1/4-28 UNF threaded parts must be verified before assembly or shipment. It applies to externally threaded bolts, studs, fittings, and machined components produced to Unified National Fine thread standards. The Go ring confirms that threads are not undersize or out-of-tolerance on the material condition side. Machinists, quality technicians, and inspection personnel are the primary users. The single-ring design is straightforward to handle and apply in both in-process and final inspection stages.

Key Features

• Go-type ring gage confirms acceptable pitch diameter on Class 2A external threads
• Sized for 1/4-28 UNF thread specification — fine-pitch Unified National Fine series
• Tool steel construction provides durability and wear resistance in high-use inspection environments
• Single-ring format for dedicated Go-function inspection without No-Go confusion
• Manufactured and calibrated to NIST-traceable standards for traceability documentation

Compatibility

Designed for use with externally threaded workpieces conforming to 1/4-28 UNF Class 2A thread standards per Unified inch screw thread specifications.

Installation Notes

Threaded ring gages are handled by quality technicians and machinists — no installation trade license is required, but proper gage discipline is essential. Store the gage in its case when not in use to prevent nicks and corrosion that would affect accuracy. Before use, clean both the gage and the workpiece thread to remove chips, coolant, and debris. Never force a ring gage onto a thread; if resistance is encountered beyond normal hand torque, stop and assess the workpiece rather than applying additional force.