Spi 34-474-7 Threaded Ring Gage M5x0.80 Class 6G No Go

Product Description

The SPI 34-474-7 is a No Go threaded ring gage designed for M5 x 0.80 metric threads, classified to Class 6G tolerance. Machined from Oil Hardened Non-Shrinking Steel (OHNS), this single-ring gage is built to maintain dimensional stability under repeated use in production and inspection environments. It is used to verify that an externally threaded fastener or component does not fall within the acceptable tolerance range, flagging oversize or out-of-tolerance threads before assembly. An NPL Traceability Certification is included, making this gage suitable for quality systems that require documented measurement standards. Machinists, quality control inspectors, and toolroom technicians are the primary users.

This gage applies to inspection of M5 x 0.80 metric externally threaded parts in manufacturing, machining, and assembly operations. It is used alongside a corresponding Go ring gage to complete a full pass/fail thread check. Typical applications include incoming inspection of fasteners, in-process thread verification on CNC-machined components, and final inspection in precision manufacturing facilities. The Class 6G classification reflects a standard commercial tolerance suitable for general-purpose metric threaded assemblies.

Key Features

• No Go classification confirms rejection of out-of-tolerance external threads at M5 x 0.80
• Class 6G tolerance matches standard commercial metric thread specifications
• Oil Hardened Non-Shrinking Steel (OHNS) construction resists wear and maintains gage integrity
• Single-ring design for straightforward pass/fail thread inspection workflow
• NPL Traceability Certification included for quality system compliance

Compatibility

Designed for use in inspection of M5 x 0.80 metric externally threaded components manufactured to Class 6G tolerance standards.

Installation Notes

Thread ring gages are inspection tools and do not require installation in a system. Handle with clean, dry hands or lint-free gloves to prevent corrosion and contamination of the gage surfaces. Store in a protective case away from other tooling to avoid nicking the thread form. Calibration intervals should follow your facility quality plan and any applicable ISO or ANSI inspection standards.