Spi 29-190-6 Class Zz Plus Plug Gage 0.19 Inch

Product Description

The SPI 29-190-6 is a Class ZZ Plus plug gage designed for precision bore measurement in machining, manufacturing, and inspection environments. Built to a 0.19-inch nominal diameter with a tolerance of 0.0002 inches, this gage provides reliable go/no-go verification of hole size conformance. Constructed from steel for durability and dimensional stability, it is a standard tool in quality control and dimensional inspection workflows. Machinists, tool and die technicians, and quality inspectors use plug gages like this one to confirm that drilled, bored, or reamed holes meet print tolerances before parts advance in production.

This plug gage is suited for use in precision manufacturing shops, machine shops, and inspection departments handling small-diameter bore verification. Its 0.19-inch measurement diameter makes it appropriate for checking holes in the corresponding size range across a variety of workpiece materials. Class ZZ Plus designation indicates a tighter tolerance class, making it a reliable choice for applications that require consistent, repeatable results. Single-unit packaging supports individual replacement or toolbox restocking.

Key Features

• Class ZZ Plus tolerance class for precise go/no-go bore inspection
• 0.19-inch nominal measurement diameter
• 0.0002-inch tolerance for repeatable dimensional verification
• Steel construction for wear resistance and long service life
• Compact and lightweight at 0.2 pounds for easy bench or field use

Compatibility

Designed as a standard Class ZZ Plus plug gage for go/no-go inspection of 0.19-inch nominal diameter bores in precision machined components.

Installation Notes

Plug gages are handled and used by machinists and quality inspection personnel — no permanent installation is required. Clean the gage and the bore being measured before use to avoid debris-induced false readings. Store the gage in a protective case when not in use to prevent surface damage and dimensional drift. Calibrate and verify the gage against a traceable standard at regular intervals per your facility quality plan.