Spi 19-276-5 Class Zz Minus Plug Pin Gage 0.276 in

Product Description

The SPI 19-276-5 is a Class ZZ minus plug pin gage machined from steel, used to verify bore diameters and hole sizes in precision measurement applications. This go/no-go style gage checks whether a feature meets its lower tolerance boundary. With a nominal diameter of 0.276 inches and a tolerance of 0.0002 inches, it provides the accuracy required for quality control inspection on the shop floor or in a metrology lab. Machinists, toolmakers, and quality inspectors rely on Class ZZ pin gages as a dependable, low-cost method for checking hole conformance to print.

This gage is suited for dimensional inspection in manufacturing, machining, and fabrication environments. It is used to check drilled, reamed, or punched holes in metal, plastic, and composite workpieces. The 0.276-inch diameter makes it appropriate for small-bore inspection tasks where precise fit verification is required. It is a standard tool in production inspection, incoming inspection, and first-article verification workflows.

Key Features

• Nominal diameter of 0.276 inches for small-bore inspection
• Class ZZ minus tolerance of 0.0002 inches for go/no-go verification
• Steel construction for durability and dimensional stability
• Compact, single-piece gage format for quick, repeatable checks
• Package quantity of 1 — sold individually

Compatibility

Designed as a standard Class ZZ minus plug pin gage for use in general-purpose bore and hole inspection applications where a 0.276-inch nominal diameter is specified.

Installation Notes

Pin gages require no power and are installed by hand. Before use, clean the gage and the bore being checked with a lint-free cloth to remove debris, oil, or burrs that could affect the reading. Apply light, consistent hand pressure when inserting the gage — never force it. Store the gage in its protective case and apply a light coat of rust-preventive oil when not in use to maintain calibration integrity.