Spi 34-224-6 Plug Thread Gage 5-44 6H No Go

Product Description

The SPI 34-224-6 is a single-end plug thread gage used to verify internal thread quality on 5-44 UNC threaded features. It is a No Go gage, meaning it checks the maximum material condition of the thread — a correctly tapped hole should reject this gage. Manufactured from steel and classified to the 6H tolerance class per ANSI standards, this gage is suited for precision inspection work in machining, assembly, and quality control environments. Traceability is backed by a NIST certification included with the gage. A size 00 handle is required for use but is not included with this gage.

This plug thread gage is intended for use in machine shops, manufacturing facilities, and inspection departments where threaded hole conformance must be verified to ANSI and NIST standards. The 5-44 thread designation indicates a number 5 screw thread with 44 threads per inch, a fine-pitch size common in small fastener and instrument applications. The single-end configuration provides the No Go member only, making it a targeted tool for go/no-go inspection setups where the Go gage is sourced separately.

Key Features

• No Go gage for 5-44 UNC internal threads — checks maximum material condition
• 6H tolerance class per ANSI standards for precise thread fit verification
• Steel construction for durability in production inspection use
• NIST traceability certification included for quality system compliance
• Single-end design accepts a size 00 handle (handle sold separately)

Compatibility

Designed for inspection of 5-44 internally threaded features classified to the 6H tolerance class. Compatible with standard size 00 thread gage handles. Handle is not included.

Installation Notes

Thread plug gages are used by quality control inspectors and machinists — no installation tools are required, but a compatible size 00 handle must be obtained separately before use. Ensure the threaded hole is free of chips, coolant, and debris before gaging. Apply only hand pressure when inserting the gage; forcing it can damage threads or the gage itself. Store in a protective case away from other tooling to preserve gage accuracy.