Spi 19-273-2 Class Zz Minus Plug Pin Gage 0.2730 in

Product Description

The SPI 19-273-2 is a Class ZZ minus plug pin gage used to verify bore and hole dimensions in precision machining and quality control applications. It measures a nominal diameter of 0.2730 inches with a minus tolerance of 0.000200 inches, making it suitable for go/no-go inspection workflows where tight dimensional control is required. Machined from steel, this pin gage provides the durability and hardness needed for repeated use in production and inspection environments. Dimensional inspection technicians, toolmakers, and quality control personnel typically keep a set of these on hand for verifying drilled, reamed, or bored hole sizes to specification.

This pin gage is used in machine shops, manufacturing facilities, and inspection departments where hole diameter verification is a routine task. Class ZZ is the standard commercial tolerance class for plug gages, appropriate for general-purpose inspection of holes in metal, plastic, and composite workpieces. The minus designation means the gage is ground to the lower limit of the nominal size, which is standard practice for a go gage application. It is a single-end pin gage intended for hand use in bench inspection or inline production checking.

Key Features

• Nominal measurement diameter of 0.2730 inches for precise hole verification
• Class ZZ minus tolerance of 0.000200 inches for general commercial inspection
• Steel construction provides hardness and wear resistance for repeated use
• Single-piece pin design suits bench inspection and production floor use
• Lightweight at 0.2 pounds for easy one-handed handling

Compatibility

Designed as a general-purpose Class ZZ minus plug pin gage for inspection of holes with a nominal diameter of 0.2730 inches across standard machined components and assemblies.

Installation Notes

Pin gages require no installation but should be handled with clean, dry hands or cotton inspection gloves to prevent corrosion from skin oils. Before use, clean the gage and the hole being checked with a lint-free cloth to remove chips, coolant, or debris that could affect the reading. Do not force the pin into an undersized hole, as this can damage the gage surface and compromise its calibration. Store pin gages in a protective case away from other tooling to prevent nicks or scoring on the ground surface.