Spi 19-044-7 Class Zz Minus Plug Pin Gage 0.044 in

Product Description

The SPI 19-044-7 is a Class ZZ minus plug pin gage machined from steel for precise go/no-go dimensional inspection. It checks a nominal hole diameter of 0.044 inches with a tolerance of 0.0002 inches, making it suitable for high-accuracy quality control work on small-bore features. Class ZZ is the standard tolerance grade for shop-floor and general inspection use. Machinists, tool-and-die makers, and quality technicians use pin gages like this one to verify hole size, concentricity setups, and fixture alignment in production and inspection environments.

This pin gage is suited for inspecting drilled, reamed, or punched holes in metal, plastic, or composite workpieces where tight dimensional control is required. The 0.044-inch diameter targets small precision bores common in instrument components, fastener clearance holes, and fine-tolerance machined parts. It is used in machine shops, manufacturing lines, and inspection labs as part of a standard pin gage set or as an individual replacement gage.

Key Features

• Class ZZ tolerance grade for general shop and inspection use
• Minus designation indicates the gage is ground to the low side of the nominal diameter
• 0.044-inch nominal diameter targets small precision bore applications
• 0.0002-inch tolerance for high-accuracy dimensional verification
• Steel construction for durability and dimensional stability

Compatibility

Designed as a standard Class ZZ minus plug pin gage for use in general shop inspection applications requiring a 0.044-inch nominal diameter check.

Installation Notes

Pin gages are handled and stored carefully to prevent surface damage that would affect measurement accuracy. Always clean the gage and the bore being checked before use. Handle with clean cotton gloves or a lint-free cloth to prevent corrosion from skin oils. Store in a protective case away from other tooling to avoid nicks or scratches on the gage surface.