Spi 19-792-1 Class Zz Minus Plug Pin Gage 0.792 in

Product Description

The SPI 19-792-1 is a Class ZZ minus plug pin gage machined to a nominal diameter of 0.792 inches with a tolerance of 0.0002 inches. Pin gages in the Class ZZ minus designation are used to verify hole diameters and bore sizes in production and inspection environments. The minus configuration means the gage is ground to the low side of the nominal dimension, making it suitable for go/no-go inspection routines where precise limit checking is required. Constructed from steel, this gage is built to withstand repeated use in shop-floor and quality-control settings. Machinists, toolmakers, and quality inspectors rely on this type of instrument to confirm dimensional conformance on machined parts and assemblies.

This plug pin gage is suited for dimensional inspection of holes and bores in light manufacturing, machined component production, and precision fabrication shops. It is used during in-process inspection and final quality checks to confirm that hole diameters fall within specified tolerances. The 0.792-inch diameter targets a specific nominal size commonly encountered in medium-precision machining applications. Both production floor technicians and quality assurance personnel use Class ZZ gages for routine inspection tasks where tight tolerancing is required but gage-block-level accuracy is not mandated.

Key Features

• Class ZZ minus designation for go/no-go limit inspection of hole diameters
• Nominal diameter of 0.792 inches for targeted bore size verification
• Tolerance of 0.0002 inches (0.0002 mm equivalent) for reliable dimensional control
• Steel construction for durability under repeated shop-floor use
• Single-piece package suitable for individual replacement or kit supplementation

Compatibility

Designed as a standard Class ZZ minus plug pin gage for use with conventional pin gage handles and sets sized for 0.792-inch diameter gage pins in inspection and quality-control applications.

Installation Notes

Pin gages should be handled with clean, dry hands or lint-free gloves to prevent corrosion from skin oils. Before use, verify that the gage surface is free of burrs, debris, and lubricant buildup that could affect dimensional readings. Store the gage in a protective case or rack away from impact hazards and temperature extremes to maintain calibration integrity. Periodic recalibration against traceable standards is recommended to confirm ongoing accuracy.