Spi 19-078-5 Class Zz Minus Plug Pin Gage 0.078 in

Product Description

The SPI 19-078-5 is a Class ZZ minus plug pin gage designed to verify hole diameters with a nominal size of 0.078 inches. Built from steel, this pin gage holds a tolerance of 0.000200 inches, making it suitable for go/no-go inspection applications in precision machining and quality control environments. Class ZZ gages are the most widely used grade for general-purpose inspection work, offering a reliable and cost-effective solution for checking drilled, reamed, or punched holes. Machinists, tool-and-die makers, and quality control technicians use these gages daily on the shop floor or at inspection stations.

This pin gage is appropriate for use in manufacturing, fabrication, and machine shop settings where consistent hole diameter verification is required. It fits standard pin gage handles or can be used as a standalone check gage for small-diameter bores. The 0.078-inch nominal diameter makes it well-suited for applications involving small fastener clearance holes, pilot holes, or precision bores in light-gauge components. It is packaged and sold individually.

Key Features

• Class ZZ tolerance grade for general-purpose go/no-go inspection
• Nominal diameter of 0.078 inches for small-bore verification
• Tolerance of 0.000200 inches for consistent, repeatable measurement
• Steel construction for durability under regular shop-floor use
• Minus designation indicates the gage is ground to the low side of tolerance

Compatibility

Designed as an OEM-style replacement or supplemental gage for use with standard pin gage handle sets and accessories compatible with 0.078-inch diameter pin gages.

Installation Notes

Pin gages require no installation but should be handled with care to avoid surface damage that can affect accuracy. Clean the gage and the hole being inspected before use to prevent false readings. Store pin gages in a protective case away from other metal tools to prevent nicking. Periodic calibration against certified standards is recommended to maintain measurement integrity in quality-controlled environments.