Vermont Gage 361157010 Threaded Ring Gage 7/8-9 Unc

Product Description

The VERMONT GAGE 361157010 is a single-ring threaded ring gage designed to verify the external thread dimensions of 7/8-9 UNC fasteners and threaded components. Classified as a Go gage under Class 2A tolerance standards, it confirms that a mating thread falls within the acceptable high limit of the tolerance range. Manufactured from tool steel, this gage delivers the hardness and dimensional stability required for consistent, repeatable inspection results on the shop floor or in a quality lab. It is used by machinists, quality control technicians, and tool room personnel working to NIST-traceable standards.

This gage is applied in manufacturing and inspection environments where 7/8-9 UNC threaded parts must meet Class 2A external thread tolerances. Typical use cases include incoming inspection of fasteners, in-process verification of machined threads, and final inspection before assembly. The single-ring Go configuration is used as one half of a complete Go/No-Go inspection routine, confirming that the thread will assemble properly with a mating component.

Key Features

• Go classification confirms thread falls within Class 2A high-tolerance limit
• 7/8-9 UNC thread form for standard unified coarse-pitch external threads
• Single-ring design for straightforward Go-only inspection workflow
• Tool steel construction provides hardness and long service life under repeated use
• Manufactured to NIST-traceable standards for reliable, documented accuracy

Compatibility

Designed for inspection of external 7/8-9 UNC threaded components manufactured to Class 2A tolerance specifications.

Installation Notes

Threaded ring gages are handled and applied by quality control technicians and machinists performing thread inspection. Keep the gage clean and lightly oiled when not in use to prevent corrosion and maintain dimensional integrity. Do not force the gage onto a thread — Go gages should engage freely under their own weight or with light hand pressure. Inspect the gage itself periodically for wear using a setting plug to confirm it remains within calibration limits.