Spi 19-382-1 Class Zz Minus Plug Pin Gage 0.382 in

Product Description

The SPI 19-382-1 is a Class ZZ minus plug pin gage with a 0.382-inch nominal diameter, manufactured from steel for dimensional inspection work. It is used to verify hole sizes and internal dimensions to a tight tolerance of 0.0002 inches, making it a practical go/no-go or attribute inspection tool. Class ZZ designates a commercial-grade tolerance class suited for production floor inspection. Machinists, toolmakers, and quality control technicians use pin gages like this one to confirm that drilled, reamed, or bored holes meet drawing specifications without the need for variable measurement instruments.

This gage is appropriate for use in machine shops, manufacturing facilities, and inspection departments where hole size conformance must be verified quickly and repeatably. The minus designation indicates the gage is ground to the lower deviation of the nominal diameter, a standard configuration for go-gage applications in attribute inspection routines. It suits both light production verification and bench-level inspection tasks across general metalworking and fabrication environments.

Key Features

• Class ZZ tolerance class for commercial-grade dimensional inspection
• Minus designation provides lower-deviation fit for go-gage use
• 0.0002-inch tolerance for consistent, repeatable hole verification
• Steel construction for durability on the production floor or inspection bench
• 0.382-inch nominal diameter for direct hole size confirmation

Compatibility

Designed as a standard Class ZZ minus plug pin gage for use in attribute inspection of 0.382-inch nominal diameter holes across general metalworking, machining, and fabrication applications.

Installation Notes

Pin gages are handled by quality control technicians and machinists and require no installation in the traditional sense. Before use, clean the gage and the hole being inspected to remove chips, oil, or debris that could affect measurement accuracy. Do not force the gage into a hole, as this can damage the gage surface or distort the inspection result. Store pin gages in a protective case and handle with care to prevent nicks or corrosion that would affect the ground diameter.