Spi 19-279-9 Class Zz Minus Plug Pin Gage 0.279 in

Product Description

The SPI 19-279-9 is a Class ZZ minus plug pin gage with a 0.279-inch nominal diameter, designed for go/no-go and tolerance verification in precision measurement applications. Manufactured from steel, this pin gage holds a tolerance of 0.0002 inches, meeting Class ZZ specifications for general-purpose inspection work. It is used to verify hole diameters, check bore sizes, and confirm dimensional compliance in machined or fabricated components. Machinists, quality control technicians, and tool-and-die professionals rely on Class ZZ pin gages for production-floor inspection and incoming parts verification.

This pin gage is suited for dimensional inspection in manufacturing, fabrication, and quality assurance environments. The 0.279-inch diameter targets bore and hole verification in metal components where close-tolerance confirmation is required. Its compact size and steel construction make it practical for both bench inspection and in-process measurement tasks. The minus designation indicates the pin is manufactured to the lower allowable tolerance boundary, providing a conservative fit check for critical hole dimensions.

Key Features

• Class ZZ tolerance class for general-purpose production and inspection use
• Minus designation confirms lower tolerance boundary for conservative fit verification
• 0.0002-inch tolerance for reliable dimensional accuracy
• Steel construction provides durability under repeated handling and use
• 0.279-inch nominal diameter covers a specific bore and hole size range

Compatibility

Designed as an OEM-style replacement or direct-use Class ZZ plug pin gage for standard go/no-go hole inspection applications in general manufacturing and quality control settings.

Installation Notes

Pin gages are handled and used by machinists and quality control technicians; no power tools or electrical shutoff is required. Keep the gage clean and lightly oiled when not in use to prevent corrosion on the steel surface. Do not force the pin into a bore that offers significant resistance, as this can damage the gage or the workpiece. Store in a protective case away from impact or contact with other metal tools to maintain dimensional accuracy.