Spi 19-072-8 Class Zz Minus Plug Pin Gage 0.072 in

Product Description

The SPI 19-072-8 is a Class ZZ minus plug pin gage used to verify bore and hole dimensions in precision machining and inspection applications. Manufactured from steel, this gage checks whether a 0.072-inch diameter hole falls within acceptable tolerance, functioning as a GO or NO-GO reference for quality control workflows. The minus designation indicates the gage is ground to the lower limit of the tolerance band, in accordance with Class ZZ gage standards. It is used by machinists, toolmakers, quality technicians, and metrology professionals to confirm dimensional conformance on production or incoming parts.

This pin gage is suited for inspection of small-diameter bores in light manufacturing, toolroom, and quality assurance environments. It is appropriate for both production floor inspection and bench-level part verification. The compact size and single-piece construction make it easy to handle and store within a gage pin set or individual gage block setup. Typical applications include checking drilled, reamed, or punched holes in metal, plastic, and composite components.

Key Features

• Class ZZ tolerance classification for general-purpose inspection use
• Minus designation: ground to the lower limit of the tolerance band
• 0.072-inch nominal diameter for small bore verification
• 0.0002-inch tolerance for reliable dimensional reference
• Steel construction for durability and wear resistance
• Single-piece gage format for straightforward handling and storage

Compatibility

Designed as a Class ZZ minus plug pin gage for general-purpose dimensional inspection of 0.072-inch diameter holes and bores in standard machining and quality control applications.

Installation Notes

Pin gages are handled by quality technicians and machinists and require no mechanical installation. Keep the gage clean and lightly oiled when not in use to prevent corrosion on the steel surface. Never force a plug gage into a hole; apply light hand pressure only to avoid gage wear or bore damage. Store individually or in a designated gage pin set case to protect the ground surface from nicks and contamination.