Spi 19-077-7 Class Zz Minus Plug Pin Gage 0.077 in

Product Description

The SPI 19-077-7 is a Class ZZ minus plug pin gage machined from steel and used to verify bore and hole dimensions in precision inspection and quality control applications. It measures 0.077 inches in diameter and carries a minus tolerance of 0.0002 inches, placing it within the Class ZZ specification for working-grade gages. Machinists, quality technicians, and tool room professionals use pin gages like this one to go/no-go check drilled, reamed, or punched holes to confirm dimensional conformance before parts advance through production.

This gage is suited for use in machine shops, fabrication facilities, and inspection departments where repeatable hole verification is required. It fits standard pin gage handle sets and works alongside other individual pin gages to build out a complete inspection range. The small 0.077-inch diameter makes it appropriate for checking fine holes in precision components, sheet metal stampings, and small machined parts.

Key Features

• Class ZZ minus tolerance of 0.0002 inches for working-grade inspection use
• 0.077-inch diameter for fine-bore verification
• Steel construction for durability in production and inspection environments
• Individual pin format compatible with standard pin gage handle sets
• Package quantity of 1 individual pin

Compatibility

Designed as a working-grade Class ZZ minus plug pin gage for use with standard pin gage handles accepting individual pin members in the applicable diameter range.

Installation Notes

Pin gages should be handled with clean cotton gloves or lint-free cloth to prevent corrosion from skin oils. Store individually or in a padded gage stand to protect the ground surface from nicks and wear. Clean the gage and the bore being measured before use to ensure accurate readings. Periodic calibration against a certified master gage is recommended to maintain traceable accuracy.