Spi 19-084-3 Class Zz Minus Plug Pin Gage 0.084 in

Product Description

The SPI 19-084-3 is a Class ZZ minus plug pin gage machined from steel, designed for go/no-go dimensional inspection of bored holes, drilled passages, and machined features at 0.084 inches diameter. Class ZZ is the standard tolerance class for general shop-floor inspection work. This gage carries a minus tolerance of 0.000200 inches, meaning the gage is ground below nominal — confirming the minimum acceptable hole size when used in a go/no-go workflow. Machinists, quality technicians, and tool-room professionals use pin gages like this one to verify dimensional conformance quickly and repeatably without setting up a CMM or bore gage.

This gage is suited for inspection of small-diameter holes in production machining, fabrication, and assembly environments. At 0.084 inches, it falls in the range commonly encountered in precision drilled passages, orifice verification, and small fastener clearance checks. It is appropriate for both job-shop inspection and higher-volume quality control applications where a physical attribute gage speeds throughput compared to a variable measurement instrument.

Key Features

• Class ZZ tolerance class — standard for general shop-floor go/no-go inspection
• Minus tolerance ground to 0.000200 inches below nominal diameter
• 0.084 inches nominal diameter for small-bore and drilled-hole inspection
• Steel construction for durability and wear resistance in production use
• Individual packaging — sold and shipped as a single gage

Compatibility

Designed as a direct-fit plug pin gage for any application requiring go/no-go attribute inspection of a 0.084-inch nominal diameter hole to Class ZZ minus tolerance standards.

Installation Notes

Pin gages are precision tools — handle them with clean, dry hands or cotton gloves to prevent corrosion from skin oils. Store in a protective case away from other metal tooling to avoid dings or burrs that would alter the ground diameter. Before use, verify the gage is clean and free of debris; even small particles can cause a false rejection or mask an out-of-tolerance condition. Periodic calibration against a traceable standard is recommended to confirm the gage remains within its stated tolerance.