Spi 19-797-0 Class Zz Minus Plug Pin Gage 0.797 in

Product Description

The SPI 19-797-0 is a Class ZZ minus plug pin gage with a 0.797-inch nominal diameter, manufactured from steel for durability in shop and inspection environments. Plug pin gages are used to verify bore and hole dimensions by confirming whether a feature passes or fails a specified tolerance threshold. The Class ZZ designation identifies this as a working-grade gage suitable for production floor inspection. A tolerance of 0.0002 inches (minus) ensures consistent, repeatable measurement results when checking machined parts for dimensional conformance.

This gage is used in manufacturing, machining, and quality control applications where hole diameter verification is required. It is suited for use on production lines, inspection stations, and toolroom environments. Machinists, quality technicians, and tool and die professionals use Class ZZ plug gages to check drilled, reamed, or bored holes during in-process or final inspection. The 0.797-inch size covers a range of common bore diameters found in precision mechanical assemblies.

Key Features

• Class ZZ working-grade tolerance for production floor and inspection use
• Nominal diameter of 0.797 inches for direct bore and hole verification
• Minus tolerance of 0.0002 inches for precise dimensional checking
• Steel construction provides wear resistance and dimensional stability
• Go/No-Go style application confirms pass or fail without measurement calculation

Compatibility

Designed as a working-grade Class ZZ minus plug pin gage for use in standard production inspection and quality control applications involving 0.797-inch nominal diameter bores.

Installation Notes

Plug pin gages are handled and used by machinists and quality control technicians. Clean the gage and the bore being checked before use to prevent debris from affecting results. Do not force the gage into a hole; light hand pressure is appropriate for Class ZZ working gages. Store the gage in a protective case away from moisture and extreme temperature changes to preserve calibration integrity.