Spi 19-830-9 Class Zz Minus Plug Pin Gage 0.83 Inch

Product Description

The SPI 19-830-9 is a Class ZZ minus plug pin gage with a 0.83-inch diameter, manufactured from steel for durability in production and inspection environments. This gage is used to verify that a hole or bore meets a specified minimum size by checking whether the pin passes through the opening. Class ZZ is the standard tolerance grade for shop-floor go/no-go inspection work. The minus designation means the gage is ground to the lower end of the tolerance range, making it suitable as a go gage in typical application. Tolerance is held to 0.000200 inches (0.0002 inches). Machinists, quality control technicians, and toolroom personnel are the primary users.

This plug pin gage is intended for use in dimensional inspection of drilled, reamed, or bored holes in manufacturing and shop environments. It is appropriate for both production-floor inspection and toolroom verification tasks where moderate precision is required. Class ZZ gages are widely used in general industrial settings where tight laboratory-grade tolerances are not required but accurate, repeatable hole checking is essential. The 0.83-inch diameter targets mid-range bore sizes common in machined components and assemblies.

Key Features

• Class ZZ tolerance grade for reliable shop-floor go/no-go inspection
• Minus designation suitable for use as a go gage in standard inspection setups
• 0.000200-inch tolerance for consistent dimensional verification
• Steel construction for wear resistance and durability in production environments
• 0.83-inch diameter targets mid-range bore and hole sizes in machined parts

Compatibility

Designed as an OEM-style replacement or direct-use plug pin gage for shop-floor and toolroom inspection applications requiring a Class ZZ minus 0.83-inch diameter gage.

Installation Notes

Plug pin gages are handled and used by machinists and quality control technicians and require no permanent installation. Clean the gage and the bore being checked before use to prevent false readings caused by debris or chip contamination. Do not force the gage through a hole, as this can damage the gage surface and alter calibration. Store gages in a protective case away from other tools to prevent nicks and wear that would affect measurement accuracy.