Spi 19-075-1 Class Zz Minus Plug Pin Gage 0.075 in

Product Description

The SPI 19-075-1 is a Class ZZ minus plug pin gage machined to a 0.075-inch nominal diameter with a tolerance of 0.0002 inches. Plug pin gages are precision hand tools used to verify hole diameters, confirm bore size after machining or reaming, and perform go/no-go inspection checks on threaded or unthreaded through-holes. The Class ZZ designation indicates a commercial-grade tolerance class suitable for production inspection and general shop use. Constructed from steel, this gage provides the hardness and wear resistance required for repeated use in a manufacturing or maintenance environment. Machinists, quality control inspectors, and toolroom technicians are the primary users.

This gage is suited for production floor inspection, incoming material verification, and tooling qualification tasks where precise hole measurement at the 0.075-inch diameter range is required. It fits into standard pin gage handle sets and can be used as a standalone gage wire for quick single-dimension checks. Applications include verifying drilled, reamed, or punched holes in metal, plastic, or composite workpieces where dimensional conformance is critical.

Key Features

• Class ZZ minus tolerance class for commercial-grade production inspection
• 0.075-inch nominal diameter for precise small-bore measurement
• Tolerance of 0.0002 inches ensures accurate go/no-go verification
• Steel construction for hardness and long service life under repeated use
• Compatible with standard plug gage handle sets for flexible deployment

Compatibility

Designed as an OEM-style replacement or direct addition to standard plug pin gage handle sets used in production inspection and quality control applications at the 0.075-inch diameter range.

Installation Notes

Plug pin gages require no installation in the traditional sense but should be handled and stored according to standard gage care practices. Clean the gage and the bore being checked before use to prevent debris from affecting readings. Gages should be stored in a protective case away from extreme temperature changes to maintain dimensional stability. Periodic calibration against a traceable master is recommended to confirm continued accuracy.