Spi 19-203-9 Class Zz Minus Plug Pin Gage 0.203 in

Product Description

The SPI 19-203-9 is a Class ZZ minus plug pin gage with a nominal diameter of 0.203 inches, manufactured from steel for dimensional inspection work. It carries a tolerance of 0.0002 inches and is built to Class ZZ minus specifications, placing it in the range commonly used for go/no-go gauging and production inspection of machined bores and holes. Machinists, tool-and-die makers, and quality control technicians rely on plug pin gages like this one to verify that drilled, reamed, or bored features fall within acceptable dimensional limits before parts move further down the line.

This gage is suited for inspection of small-diameter holes in a production or job-shop environment. At 0.203 inches, it covers bore diameters common in precision machined components including housings, fittings, and mechanical assemblies. Class ZZ gages are generally applied where inspection volume is high or where tooling-grade accuracy is not required, making this a practical choice for incoming inspection, in-process checks, and first-article verification.

Key Features

• Class ZZ minus specification for production-grade bore inspection
• 0.203 inch nominal diameter for small-bore gauging applications
• Tolerance of 0.0002 inches for consistent, repeatable measurement
• Steel construction for durability in shop environments
• Single-piece pin format for straightforward go/no-go inspection workflow

Compatibility

Designed as an OEM-style gauging tool for use in any inspection or quality control application requiring Class ZZ minus plug pin gage verification of 0.203 inch nominal diameter bores.

Installation Notes

Plug pin gages are handled and stored by quality control technicians and machinists; no power-down or system shutoff is required for use. Keep the gage clean and lightly oiled when not in use to prevent corrosion and preserve accuracy. Avoid dropping or impacting the pin, as damage to the gauging surface will compromise dimensional integrity. Reference ASME B89.1.5 for applicable gage tolerance and use standards.