Spi 29-864-6 Class Zz Plus Plug Gage 0.864 in

Product Description

The SPI 29-864-6 is a Class ZZ Plus plug gage designed for go/no-go dimensional inspection of bored, drilled, or reamed holes with a nominal diameter of 0.864 inches. It holds a tolerance of 0.0002 inches, meeting the ANSI Class ZZ Plus specification for working gages used in production and quality-control environments. The gage is manufactured from steel for hardness and wear resistance. Machinists, quality technicians, and tool-room professionals use plug gages like this one to verify hole diameter conformance quickly and reliably without requiring a measuring instrument readout.

This plug gage is suited for inspection of machined components in general manufacturing, job shops, and production environments where hole diameter verification is part of a standard quality workflow. It is appropriate for use on metal, plastic, or composite workpieces wherever a 0.864-inch nominal bore diameter must be confirmed to close tolerance. The single-end or double-end handle format typical of this gage class allows fast pass/fail determination at the point of manufacture or incoming inspection.

Key Features

• Class ZZ Plus tolerance rating at 0.0002 inches for reliable go/no-go inspection
• 0.864-inch nominal measurement diameter
• Steel construction for hardness and long service life in production use
• Compact and lightweight at 0.2 pounds for easy one-handed use at the machine or bench
• Single-piece packaging suitable for individual gage management and calibration tracking

Compatibility

Designed as an OEM-style working gage for any application requiring go/no-go inspection of a 0.864-inch nominal diameter hole in conformance with ANSI Class ZZ Plus standards.

Installation Notes

Plug gages are handled and used by quality technicians and machinists; no power source or trade license is required. Always clean and deburr the bore before gauging to prevent damage to the gage or a false reading. Do not force the gage through a hole that does not accept it freely, as forcing can scratch the gage surface and alter its calibration. Store the gage in its case away from abrasive materials to maintain dimensional integrity between calibration intervals.