Spi 29-210-2 Class Zz Plus Plug Gage 0.21 in Steel

Product Description

The SPI 29-210-2 is a Class ZZ Plus plug gage designed for precision go/no-go inspection of bored holes, drilled passages, and machined openings with a nominal diameter of 0.21 inches. Built from steel, this fixed-limit gage delivers a tolerance of 0.0002 inches, meeting Class ZZ Plus accuracy standards for shop-floor and inspection use. It is a standard tool for machinists, quality control inspectors, and toolroom technicians who need reliable, repeatable measurement verification without the setup time of adjustable gaging. The compact form and lightweight construction at 0.2 pounds make it easy to handle during high-volume inspection tasks.

This plug gage is suited for dimensional inspection in general manufacturing, job shop machining, and production line quality control environments. It is used to verify that a drilled, reamed, or bored hole falls within acceptable tolerance before assembly or further machining. Applications include aerospace component inspection, hydraulic manifold verification, and any precision-machined part requiring hole-diameter conformance at the 0.21-inch nominal size. Suitable for both incoming inspection and in-process quality checks.

Key Features

• Class ZZ Plus tolerance rating of 0.0002 inches for precise go/no-go inspection
• Nominal measurement diameter of 0.21 inches
• Steel construction for durability and wear resistance in shop environments
• Lightweight at 0.2 pounds for extended handling during inspection tasks
• Fixed-limit design eliminates setup variation common with adjustable gages

Compatibility

Designed as an OEM-style fixed-limit plug gage for inspection of holes with a nominal diameter of 0.21 inches across general machining and manufacturing applications.

Installation Notes

Plug gages are used by machinists and quality control inspectors and require no installation in the traditional sense. Before use, clean the gage and the workpiece bore with a lint-free cloth to remove chips, oil, and debris that could affect measurement accuracy. Do not force the gage through a hole; excessive insertion force can damage the gage land and produce inaccurate readings. Store the gage in a protective case away from heat sources and abrasive materials to maintain calibration integrity.