Spi 34-521-5 Threaded Ring Gage M33x2.00 Class 6G Go

Product Description

The SPI 34-521-5 is a single-ring threaded ring gage designed to verify external M33 x 2.00 metric threads to Class 6G tolerance. This is the Go member of a Go/No-Go gage set, used to confirm that a threaded workpiece falls within the acceptable minimum material condition. Manufactured from Oil Hardened Non-Shrinking Steel (OHNS), the gage provides dimensional stability under repeated use in production and inspection environments. An NPL Traceability Certification is included, supporting quality management systems that require documented measurement standards. Machinists, quality control technicians, and tool room inspectors are the primary users of this instrument.

This gage is suited for incoming inspection, in-process thread verification, and final inspection of externally threaded components machined to M33 x 2.00 metric specifications. It is appropriate for use in precision manufacturing, aerospace, automotive, and general industrial settings where Class 6G thread tolerance must be confirmed. The single-ring Go design is used as a standalone gage or paired with a No-Go ring gage to complete a full Go/No-Go inspection routine.

Key Features

• Go member for M33 x 2.00 metric external thread inspection
• Class 6G tolerance classification for standard fit verification
• Oil Hardened Non-Shrinking Steel (OHNS) construction for dimensional stability
• Single-ring design for straightforward Go/No-Go inspection workflows
• NPL Traceability Certification included for quality system compliance

Compatibility

Designed for inspection of externally threaded components with M33 x 2.00 metric thread form to Class 6G tolerance standards.

Installation Notes

Threaded ring gages are inspection instruments handled by quality control technicians or machinists — no permanent installation is required. Store the gage in a clean, dry environment and apply a light coat of gage oil before and after use to prevent corrosion. Do not force the gage onto a thread; smooth, hand-torque engagement only. Calibration intervals should be maintained per the facility quality management plan to preserve NPL traceability.