Spi 34-656-9 Plug Thread Gage Handle Size 4 Steel

Product Description

The SPI 34-656-9 is a size 4 plug thread gage handle machined from steel and designed to accept plug-style thread gages used for verifying internal thread dimensions. The handle provides a secure, ergonomic grip for technicians performing thread inspection on tapped holes across a range of thread sizes. A Certification of Inspection traceable to ANSI and NIST standards is included, supporting quality-controlled environments where documentation is required. This handle is a standard tool in metrology, machining, and precision fabrication shops where thread integrity is a critical acceptance criterion.

This handle is suited for use in machine shops, manufacturing facilities, and inspection departments working with threaded components. It accommodates plug thread gages in the following thread sizes: 1-1/8-12, 1-1/8-7, 1-12, 1-14, 1-20, 1-8, 7/8-14, 7/8-20, and 7/8-9. The size 4 designation indicates the handle class, which corresponds to the shank diameter range of the gage members it accepts. This tool is typically used by quality control inspectors, machinists, and toolroom personnel.

Key Features

• Size 4 handle class accommodates a specific range of plug gage shank diameters
• Steel construction provides durability and dimensional stability under repeated use
• Compatible with plug thread sizes spanning 7/8-inch and 1-inch series threads in multiple pitches
• ANSI- and NIST-traceable Certification of Inspection included for documentation and audit requirements
• Package quantity of 1 — sold individually

Compatibility

Designed for use with plug thread gages in the following thread sizes: 1-1/8-12, 1-1/8-7, 1-12, 1-14, 1-20, 1-8, 7/8-14, 7/8-20, and 7/8-9. Confirm gage shank diameter matches the size 4 handle specification before installation.

Installation Notes

Thread gage handles are installed by machinists and quality control technicians — no special tools are required to seat a compatible gage member into the handle. Ensure the gage member shank is clean and free of burrs before insertion to avoid damage to the handle bore. Follow shop metrology procedures and applicable ANSI standards for gage calibration intervals and storage. Do not force gage members that do not seat freely, as this may indicate a shank size mismatch.