Spi 19-017-3 Class Zz Minus Plug Pin Gage 0.017 in

Product Description

The SPI 19-017-3 is a Class ZZ minus plug pin gage machined from steel, designed to verify bore and hole diameters to a nominal size of 0.017 inches. Class ZZ is the standard tolerance class for go/no-go dimensional inspection in general manufacturing and quality control environments. This gage holds a tolerance of 0.0002 inches, making it suited for checking drilled, reamed, or punched holes where dimensional conformance is required. Machinists, quality technicians, and tool-and-die professionals use pin gages like this one to confirm whether a feature falls within acceptable limits before assembly or further machining operations.

This pin gage is used in machine shops, production facilities, and inspection departments handling small-diameter hole verification. At 0.017 inches nominal diameter, it fits applications involving fine drill sizes and small-bore work common in precision parts, instrument housings, and light-duty mechanical assemblies. The minus designation means the gage is manufactured to the lower boundary of the tolerance band, which is standard practice for plug gages intended to check minimum material condition.

Key Features

• Class ZZ tolerance class for general-purpose go/no-go hole inspection
• Nominal diameter of 0.017 inches for small-bore and fine-drill applications
• Tolerance of 0.0002 inches for reliable dimensional verification
• Minus designation — manufactured to the lower tolerance boundary
• Steel construction for durability in shop and inspection environments

Compatibility

Designed as a standard Class ZZ minus plug pin gage for use with compatible pin gage handles and sets in general-purpose dimensional inspection applications requiring 0.017-inch nominal diameter verification.

Installation Notes

Pin gages should be handled with clean, dry hands or cotton gloves to prevent corrosion from skin oils. Before use, verify the gage surface is free of burrs, debris, and damage that could affect measurement accuracy. Store the gage in its protective case when not in use to maintain calibration integrity. Periodic recalibration against traceable standards is recommended per your facility quality plan.