Spi 29-781-2 Class Zz Plus Plug Gage 0.781 in

Product Description

The SPI 29-781-2 is a Class ZZ Plus plug gage designed for go/no-go inspection of 0.781-inch diameter bores and holes. Built from steel, it provides a reliable reference for verifying internal dimensions to a tolerance of 0.0002 inches, making it appropriate for quality control in machine shops, manufacturing facilities, and precision fabrication environments. Machinists and quality technicians use plug gages like the 29-781-2 to confirm that drilled, reamed, or bored holes fall within specified dimensional limits before parts move to the next stage of production.

This gage is suited for inspection of machined components where 0.781-inch nominal bore diameter must be verified. Class ZZ Plus is a standard tolerance class used for general-purpose inspection of production parts. The compact form and steel construction make it practical for bench inspection stations and floor-level quality checks. It ships individually and is sold in a minimum order quantity of one unit.

Key Features

• Class ZZ Plus tolerance classification for general-purpose bore inspection
• 0.781-inch nominal measurement diameter
• 0.0002-inch tolerance for precise dimensional verification
• Steel construction for durability and dimensional stability
• Lightweight at 0.2 pounds for easy handling at the bench or on the floor

Compatibility

Designed as a general-purpose plug gage for inspecting bores and holes with a 0.781-inch nominal diameter in machined components across production and quality control applications.

Installation Notes

Plug gages are handled and used by machinists and quality control technicians rather than installed permanently. Clean the gage and the bore thoroughly before use to prevent false readings caused by debris or coolant residue. Store the gage in its case when not in use to protect the gauging surface from nicks and corrosion. Do not force the gage into an undersized hole, as this can damage the gage surface and affect measurement accuracy.