Spi 34-516-5 Threaded Ring Gage M27 X 3.00 Class 6G No Go

Product Description

The SPI 34-516-5 is a No Go threaded ring gage designed to verify M27 x 3.00 external threads to Class 6G tolerance. Manufactured from Oil Hardened Non-Shrinking Steel (OHNS), this single-ring gage provides the hardness and dimensional stability required for accurate, repeatable thread inspection in production and quality-control environments. NPL Traceability Certification is included, supporting compliance with inspection documentation requirements. Licensed machinists, quality technicians, and metrology professionals use this gage to reject out-of-tolerance threaded workpieces before assembly.

This gage is suited for inspecting metric external threads in manufacturing, machining, and precision fabrication settings. It is used in conjunction with a corresponding Go ring gage to confirm that threaded fasteners, shafts, and machined components fall within Class 6G tolerance limits. Typical applications include incoming inspection, in-process quality checks, and final acceptance testing on production lines where M27 x 3.00 threaded parts are produced.

Key Features

• No Go classification for rejecting oversize or out-of-tolerance M27 x 3.00 threads
• Class 6G tolerance — standard fit class for general-purpose metric external threads
• Oil Hardened Non-Shrinking Steel (OHNS) construction for dimensional stability and wear resistance
• Single-ring design for dedicated No Go inspection
• NPL Traceability Certification included for quality system documentation

Compatibility

Designed for inspection of M27 x 3.00 external threads manufactured to Class 6G tolerance. Use with a matching Go threaded ring gage to complete a full attribute thread inspection routine.

Installation Notes

Thread ring gages are handled and stored by quality control technicians and trained inspection personnel, not installed in the traditional sense. Keep the gage clean and lightly oiled when not in use to prevent corrosion and maintain accuracy. Do not force the gage onto a threaded workpiece — a properly manufactured No Go gage should not pass over a conforming thread. Periodic recalibration against traceable standards is recommended to confirm gage wear has not affected accuracy.