Vermont Gage 361148030 Threaded Ring Gage 5/8-18 Unf

Product Description

The VERMONT GAGE 361148030 is a single-ring threaded ring gage used to verify that an external thread does not exceed maximum material condition. As a No Go gage in a Class 2A tolerance system, it confirms the thread pitch diameter stays within the specified upper limit. The 361148030 is ground from tool steel to NIST-traceable standards, making it a reliable reference tool for production inspection, incoming quality control, and job-shop verification of 5/8-18 UNF external threads. Machinists, quality technicians, and tool-room professionals use this gage as part of a go/no-go inspection routine.

This gage is designed for use with 5/8-18 UNF (Unified National Fine) external threads. A Class 2A tolerance class is the standard fit for most fastener and general-purpose applications where controlled clearance is required. The No Go ring is used alongside a matching Go ring gage to complete a full two-check inspection. Typical applications include threaded shafts, bolts, studs, and machined components in mechanical, fluid-system, and structural assemblies across industrial and trade environments.

Key Features

• No Go classification confirms thread pitch diameter does not exceed Class 2A upper limit
• 5/8-18 UNF thread size for fine-pitch external thread inspection
• Single-ring design for dedicated No Go inspection step
• Tool steel construction for wear resistance and dimensional stability
• Manufactured to NIST-traceable standards for reliable inspection accuracy

Compatibility

Designed for inspection of 5/8-18 UNF Class 2A external threads. Used as the No Go member of a standard go/no-go ring gage set for this thread form.

Installation Notes

Threaded ring gages are handled and used by machinists and quality control technicians — not installed in a system. Before use, clean both the gage and the threaded workpiece to remove chips, oil, and debris that could affect the reading. Apply light gage oil to reduce wear on the gage threads during inspection. Store the gage in its case when not in use to prevent damage to the precision ground threads.