Spi 19-762-4 Class Zz Minus Plug Pin Gage 0.762 in

Product Description

The SPI 19-762-4 is a Class ZZ minus plug pin gage machined from steel, designed to verify bore and hole diameters to a nominal size of 0.762 inches. Class ZZ gages are manufactured to a minus tolerance, meaning the gage is intentionally undersized from nominal by the stated tolerance value. This gage holds a tolerance of 0.0002 inches, making it suitable for go/no-go inspection work in production and quality-control environments. Machinists, toolmakers, and metrology technicians use plug pin gages to confirm that drilled, reamed, or bored features fall within acceptable dimensional limits before parts advance through the manufacturing process.

This gage is appropriate for use in inspection departments, machine shops, and tool rooms where dimensional verification of hole features is required. It is suited to both incoming inspection and in-process quality checks on machined components. The 0.762-inch nominal diameter positions this gage in a common range for general-purpose hole inspection across light manufacturing and precision machining applications. A single gage is supplied per package.

Key Features

• Class ZZ minus tolerance construction for go/no-go hole inspection
• 0.762-inch nominal diameter for direct size verification
• 0.0002-inch tolerance for reliable dimensional control
• Steel construction provides durability in shop-floor environments
• Single-piece packaging suitable for individual replacement or small-kit builds

Compatibility

Designed as a standard Class ZZ minus plug pin gage for use with handle sets and gage holders that accept 0.762-inch diameter pin gages in general-purpose dimensional inspection applications.

Installation Notes

Plug pin gages should be handled with clean, dry hands or cotton gloves to prevent corrosion from skin oils, which can affect accuracy over time. Store the gage in its protective case when not in use and allow it to temperature-stabilize in the inspection environment before use, as thermal expansion can affect readings at tight tolerances. Cleaning with a lint-free cloth and light oil after use will extend service life. Periodic calibration against a certified master is recommended to confirm the gage remains within tolerance.