Spi 34-314-5 Plug Thread Gage 3/4-10 6H Single End No Go

Product Description

The SPI 34-314-5 is a single-end plug thread gage designed to verify that an internally threaded workpiece does not accept an out-of-tolerance fit. Configured as a No Go member, it confirms the thread does not exceed the maximum material condition for a 3/4-10 thread form at 6H classification. The gage body is manufactured from steel for dimensional stability under repeated use. A Size 3 handle is required for operation but is not included with this gage. This tool is used by machinists, quality control inspectors, and field technicians who need traceable, standards-compliant thread verification.

The 34-314-5 applies to inspection of 3/4-10 UNC internally threaded components in manufacturing, maintenance, and assembly environments. The 6H classification designates a standard tolerance class for general-purpose metric and unified thread gaging applications. Typical use cases include incoming inspection of threaded fastener holes, verification of tapped holes in metal fabrication, and quality audits on threaded pipe fittings or structural components. Traceability documentation to NIST is included, supporting ISO and quality management system recordkeeping requirements.

Key Features

• No Go plug configuration checks that internal threads do not exceed maximum material condition for 3/4-10 thread size
• 6H tolerance class meets ANSI standards for general-purpose thread gaging
• Steel construction provides dimensional stability and resistance to wear during repeated inspection use
• NIST traceability certification included, supporting documented quality management systems
• Single-end design sized for use with a Size 3 handle (handle sold separately)
• Complies with ANSI and NIST standards for thread gage accuracy and traceability

Compatibility

Designed for inspection of 3/4-10 UNC internally threaded features where 6H class tolerance verification is required. Requires a Size 3 plug gage handle, which is not included.

Installation Notes

Thread gages are inspection instruments and should be handled by qualified inspection or machining personnel. Store the gage in a protective case away from temperature extremes and contaminants that could affect calibration. Do not force the No Go member into a threaded hole; resistance to entry indicates a conforming thread. Periodic recalibration against a traceable standard is recommended to maintain measurement integrity.