Spi 34-526-4 Threaded Ring Gage M36x3 Class 6G No Go

Product Description

The SPI 34-526-4 is a metric threaded ring gage used to verify that an external thread does not exceed its maximum material condition. Classified as a No Go gage to Class 6G tolerance, it checks the low limit of fit for M36 x 3.00 metric threads. The gage is manufactured from Oil Hardened Non-Shrinking Steel (OHNS), which provides dimensional stability and resistance to wear over repeated use cycles. Each unit ships with an NPL Traceability Certification, supporting calibration documentation requirements in quality management and inspection environments. Machinists, quality technicians, and thread inspection personnel use this gage on production floors and in metrology labs.

This gage is designed for inspecting external M36 x 3.00 metric threads to Class 6G tolerance, a medium-fit classification widely used in general-purpose metric fastener applications. It is a single ring design, meaning it covers one function — No Go — and is typically paired with a corresponding Go ring gage to complete a full thread acceptance check. Suitable for use in manufacturing, machining, and precision inspection settings where metric thread verification is required.

Key Features

• No Go function verifies external threads do not exceed maximum material condition for Class 6G fit
• M36 x 3.00 metric thread size, single ring configuration
• Oil Hardened Non-Shrinking Steel (OHNS) construction for dimensional stability and durability
• NPL Traceability Certification included for calibration and quality system compliance
• Single ring design for dedicated No Go inspection — pair with a Go ring gage for complete thread verification

Compatibility

Designed for inspection of external M36 x 3.00 metric threads manufactured to Class 6G tolerance per applicable metric thread standards.

Installation Notes

Thread ring gages are a hand-tool inspection instrument and require no permanent installation. A correctly sized No Go ring gage should not pass fully over the threaded part — if it does, the thread is out of tolerance. Handle with clean, dry hands or lint-free gloves to prevent corrosion and dimensional contamination. Store in a protected case and recalibrate on a schedule consistent with your quality management system requirements.