Spi 19-441-5 Class Zz Minus Plug Pin Gage 0.441 in

Product Description

The SPI 19-441-5 is a Class ZZ minus plug pin gage machined from steel, used to verify that a hole or bore falls within a specified minimum acceptance threshold. At 0.441 inches in diameter with a tolerance of 0.0002 inches, this gage gives machinists and quality-control technicians a reliable go/no-go reference for precision inspection work. Class ZZ is the standard tolerance grade for plug gages used in general-purpose inspection, making this tool appropriate for production-floor and shop environments where consistent, repeatable measurement is required.

This pin gage is suited for use in manufacturing, machining, and quality assurance applications where hole diameter must be confirmed to close tolerances. It is commonly used in machine shops, toolrooms, and production lines inspecting drilled, reamed, or bored holes. The minus designation means the gage is manufactured to the lower end of the nominal tolerance band, which is standard practice for go-type plug gage applications.

Key Features

• Class ZZ tolerance grade for general-purpose plug gage inspection
• Minus designation — manufactured to the lower end of the tolerance band
• 0.0002 inches (0.0002 mm) tolerance for precise go/no-go verification
• Steel construction for durability and wear resistance in production environments
• 0.441 inches nominal diameter

Compatibility

Designed as a general-purpose Class ZZ minus plug pin gage for use with standard gage handle sets accepting 0.441 inch diameter pin gages in machining and quality inspection applications.

Installation Notes

Plug pin gages are handled and used by machinists, toolroom technicians, and quality assurance inspectors. Clean the gage and the bore thoroughly before use to prevent debris from affecting measurement accuracy. Store the gage in its protective case when not in use to prevent nicks, corrosion, or dimensional damage. Periodically re-calibrate or re-certify the gage per your facility's metrology schedule to ensure readings remain traceable.