Spi 19-497-7 Class Zz Minus Plug Pin Gage 0.497 in

Product Description

The SPI 19-497-7 is a Class ZZ minus plug pin gage machined from steel, designed to verify that a hole or bore meets minimum dimensional tolerance requirements. With a nominal diameter of 0.497 inches and a tolerance of 0.0002 inches, this gage provides reliable go/no-go measurement for precision inspection work. Class ZZ gages are the standard for inspection and production floor use where consistent, repeatable dimensional verification is required. Machinists, quality control technicians, and tool-and-die professionals use pin gages like this one to confirm bore sizing during manufacturing and incoming inspection workflows.

This plug pin gage is suited for use in machine shops, fabrication facilities, and manufacturing environments where close-tolerance hole inspection is part of standard quality assurance procedures. The minus designation means the gage is manufactured to the lower boundary of the nominal size, making it appropriate for checking minimum hole acceptance conditions. It is a single-piece gage intended for handheld use in direct contact measurement applications.

Key Features

• Class ZZ tolerance class for production and inspection floor use
• Nominal diameter of 0.497 inches for precise bore verification
• Tolerance of 0.0002 inches (0.0002 mm) for high-accuracy dimensional checks
• Minus designation confirms minimum bore size acceptance
• Steel construction for durability and wear resistance in regular shop use
• Lightweight at 0.2 pounds for easy single-hand operation

Compatibility

Designed as a standard Class ZZ minus plug pin gage for use in any inspection or production application requiring verification of a 0.497-inch nominal bore diameter.

Installation Notes

Pin gages are used by quality control technicians and machinists and require no installation. Before use, clean both the gage and the bore being measured to remove debris, oil, or chips that could affect accuracy. Do not force the gage into a bore; resistance indicates the hole is undersize. Store the gage in a protective case and handle with clean, dry hands or cotton gloves to prevent corrosion and measurement error.