Spi 19-739-2 Class Zz Minus Plug Pin Gage 0.739 in

Product Description

The SPI 19-739-2 is a Class ZZ minus plug pin gage designed for dimensional inspection of holes, bores, and internal features requiring precise measurement verification. It measures a nominal diameter of 0.739 inches with a minus tolerance of 0.0002 inches, placing it within the Class ZZ tolerance range suitable for general-purpose go/no-go inspection work. Constructed from steel for wear resistance and dimensional stability, this plug gage is used by machinists, quality control technicians, and tool-and-die professionals to verify that bored or drilled features meet print specifications before assemblies move to the next stage of production.

This gage is applied in machine shops, manufacturing facilities, and quality inspection environments where hole diameter conformance must be confirmed quickly and reliably. It is a single-ended plug gage suited for checking whether a feature accepts the gage member, making it appropriate for incoming inspection, in-process checks, and final verification on production floors. The lightweight steel construction at 0.2 pounds keeps handling fatigue minimal during repetitive inspection tasks.

Key Features

• Nominal measurement diameter of 0.739 inches for precise bore and hole inspection
• Class ZZ minus tolerance of 0.0002 inches for general-purpose dimensional verification
• Steel construction provides durability and resistance to wear under repeated use
• Lightweight at 0.2 pounds for comfortable handling during high-volume inspection
• Single-unit packaging supports individual replacement or tooling additions

Compatibility

Designed as a general-purpose Class ZZ plug pin gage for use with standard gage handle systems and gage blocks in quality inspection and machining applications where a 0.739-inch nominal bore diameter must be verified.

Installation Notes

Plug pin gages are handled and applied by machinists and quality control technicians without special tooling installation. Store and handle gages with clean, dry hands or lint-free gloves to prevent corrosion from skin oils and to preserve dimensional accuracy. Apply only light, controlled insertion force when checking a bore — forcing a gage can damage both the gage and the workpiece. Calibrate or verify the gage against a traceable standard at regular intervals per your facility quality plan.