Spi 34-233-7 Plug Thread Gage 8-32 6H Single End No Go

Product Description

The SPI 34-233-7 is a single-end No Go plug thread gage designed to verify internal thread quality on 8-32 unified coarse threads to 6H tolerance class. Machinists, quality control technicians, and tool-and-die professionals use plug thread gages to confirm that a threaded hole rejects out-of-tolerance parts before assembly. The No Go member checks that the thread pitch diameter does not fall below the minimum material condition limit. Constructed from steel, this gage is sized for a Size 0 handle, which is sold separately. A NIST-traceable traceability certification is included, supporting quality system documentation requirements under ANSI standards.

This gage is used in precision manufacturing, aerospace, and general metalworking environments where 8-32 threaded holes must meet tight tolerance requirements. It is appropriate for incoming inspection, in-process quality checks, and final acceptance testing. Because the handle is not included, the gage member can be paired with a compatible Size 0 handle already in the technician's inventory, keeping replacement costs low when only the gage member needs to be updated.

Key Features

• No Go member only — confirms rejection of threads outside 6H tolerance limits
• Sized for 8-32 unified coarse thread applications
• 6H classification meets ANSI and NIST standards for precision thread inspection
• Steel construction for durability in production inspection environments
• NIST-traceable traceability certification included for quality system compliance
• Size 0 handle compatibility — handle sold separately, reducing replacement cost

Compatibility

Designed for use with a Size 0 plug gage handle (sold separately) and intended for inspection of 8-32 internal threads held to 6H tolerance class per ANSI standards.

Installation Notes

This gage member must be seated into a compatible Size 0 handle before use — do not attempt to use the gage member without a properly secured handle. Inspect the gage for nicks, burrs, or wear before each use, as surface damage will produce unreliable readings. Store the gage in a protective case away from other tooling to prevent contact damage. Calibration intervals should follow the facility quality management plan and applicable ANSI gage-calibration guidelines.