Spi 19-880-4 Class Zz Minus Plug Pin Gage 0.88 in

Product Description

The SPI 19-880-4 is a Class ZZ minus plug pin gage designed for precision hole inspection and go/no-go gauging applications. With a nominal diameter of 0.88 inches and a tolerance of 0.0002 inches, this gage provides the tight dimensional control required for verifying bore sizes in manufactured parts. Constructed from steel, it is built to withstand repeated use in shop-floor and inspection environments. Class ZZ is the standard tolerance class for plug gages used in general-purpose inspection, and the minus designation means the gage is ground to the lower end of the tolerance range, confirming that a hole meets minimum size requirements.

This plug pin gage is used in machining, fabrication, and quality control settings where bore diameter verification is part of standard inspection protocol. It is suited for checking holes in metal components, fixtures, and assemblies where dimensional accuracy is critical. Machinists, quality control technicians, and tool room personnel typically use plug gages of this type during in-process and final inspection steps.

Key Features

• Class ZZ tolerance class for general-purpose plug gage inspection
• Minus designation confirms minimum hole size acceptance
• 0.88 inch nominal diameter for direct bore verification
• Tolerance of 0.0002 inches for precise dimensional control
• Steel construction for durability in shop and inspection environments

Compatibility

Designed as a general-purpose Class ZZ minus plug pin gage for use with standard bore inspection procedures requiring a 0.88 inch nominal diameter.

Installation Notes

Plug pin gages are used by machinists and quality technicians and require no permanent installation. Keep the gage clean and lightly oiled when not in use to prevent corrosion. Handle with care to avoid impact damage, which can alter the ground diameter and affect measurement accuracy. Follow your facility calibration schedule and applicable dimensional inspection standards when using precision gages.