Spi 29-773-9 Class Zz Plus Plug Gage 0.773 in

Product Description

The SPI 29-773-9 is a Class ZZ Plus plug gage designed for go/no-go dimensional inspection of cylindrical bores and holes measuring 0.773 inches in diameter. Built to Class ZZ Plus tolerances of 0.0002 inches, this gage delivers reliable pass/fail verification in production and inspection environments. The steel construction provides durability under repeated use in shop-floor conditions. Machinists, quality control technicians, and toolroom professionals use plug gages like this to confirm that drilled, reamed, or bored holes meet print tolerances before parts move to the next stage of production.

This plug gage is suited for use in manufacturing, machining, and fabrication settings where hole size verification is required. It fits standard inspection workflows for both incoming material checks and in-process quality control. The 0.773-inch diameter targets a specific bore size commonly encountered in general metalworking and precision machining applications. A single gage is supplied per package, making it straightforward to stock as a replacement or add to an existing gage set.

Key Features

• Class ZZ Plus tolerance rating at 0.0002 inches for precise pass/fail inspection
• 0.773-inch nominal diameter for direct bore measurement
• Steel construction for wear resistance and dimensional stability
• Single-piece package suitable for individual stocking or kit supplementation
• Compact and lightweight at 0.2 pounds for easy handling at the inspection station

Compatibility

Designed as a standard Class ZZ Plus plug gage for go/no-go inspection of 0.773-inch diameter bores in general machining and manufacturing applications.

Installation Notes

Plug gages are handled and used by machinists and quality technicians — no installation is required, but proper gage care is essential. Keep the gage clean and lightly oiled when not in use to prevent corrosion on the steel surfaces. Do not force the gage into a bore; excessive insertion force can damage both the gage and the workpiece. Store in a protective case away from temperature extremes to maintain dimensional accuracy.