Spi 29-059-3 Class Zz Plus Plug Gage 0.059 in

Product Description

The SPI 29-059-3 is a Class ZZ Plus plug gage used to verify bore and hole diameters to a precise 0.059-inch nominal size. Built from steel, this go/no-go style gage delivers a tolerance of 0.0002 inches, making it suitable for inspection work where tight dimensional control is required. Machinists, quality technicians, and tool room professionals use plug gages like this one to confirm that drilled, reamed, or bored holes fall within specified limits before parts move to the next stage of production or assembly.

This gage is intended for use in shop-floor and inspection environments where small-diameter hole verification is a routine task. The Class ZZ Plus classification places it in the commercial-grade range, appropriate for general production inspection rather than master or working gage applications. Its compact size and steel construction make it a practical choice for repetitive use on production runs requiring consistent 0.059-inch bore confirmation.

Key Features

• 0.059-inch nominal diameter for precision small-bore inspection
• Class ZZ Plus tolerance rating at 0.0002 inches for reliable go/no-go measurement
• Steel construction for durability in production and inspection environments
• Single-piece package quantity suited for individual technician or toolbox use

Compatibility

Designed as an OEM-style inspection tool for verifying 0.059-inch diameter bores in metal, plastic, or composite workpieces across general manufacturing and machining applications.

Installation Notes

Plug gages are handled by quality technicians and machinists and require no permanent installation. Before use, clean the gage and the bore being measured to remove chips, coolant, or debris that could affect readings. Store the gage in a protective case away from tools and abrasive surfaces to preserve the lapped finish and maintain dimensional accuracy. Handle with care to avoid dropping, as impact can alter the gage diameter and invalidate measurements.