Spi 19-944-8 Class Zz Minus Plug Pin Gage 0.944 in

Product Description

The SPI 19-944-8 is a Class ZZ minus plug pin gage used to verify bore and hole diameters to a high degree of dimensional accuracy. Manufactured from steel, this pin gage checks whether a feature falls within a specified tolerance range. The 19-944-8 has a nominal diameter of 0.944 inches and carries a tolerance of 0.0002 inches, making it suitable for go/no-go inspection work on machined components. Class ZZ designates the loosest tolerance class in the inch plug gage series, typically applied to inspection of parts produced to commercial-grade tolerances. Machinists, tool-and-die makers, and quality control technicians use this type of gage as part of standard dimensional inspection routines.

This plug pin gage is used in machine shops, manufacturing facilities, and quality inspection departments where accurate bore verification is required. It is appropriate for checking drilled, reamed, or bored holes in metal and other rigid materials. The 0.944-inch diameter targets mid-range bore sizes common in general-purpose machined parts. Single-piece packaging makes it straightforward to add to an existing gage set or replace a worn member in a current set.

Key Features

• Nominal diameter of 0.944 inches for precise bore inspection
• Class ZZ minus tolerance of 0.0002 inches per inch gage standards
• Steel construction for durability and dimensional stability
• Minus designation indicates the gage is ground to the lower boundary of the tolerance band
• Packaged individually for single-member replacement or standalone use

Compatibility

Designed as an OEM-style replacement or supplemental member for Class ZZ inch plug gage sets requiring a 0.944-inch diameter pin.

Installation Notes

Plug pin gages are handled and stored by metrology and quality control professionals following standard gage-handling procedures. Clean the gage and the bore being checked before use to prevent debris from affecting readings. Store the pin in a protective case away from humidity and temperature extremes to maintain dimensional stability. Do not force the gage into a hole; controlled hand pressure is standard practice to avoid damage to the gage or the workpiece.