Spi 29-268-0 Class Zz Plus Plug Gage 0.268 Inch

Product Description

The SPI 29-268-0 is a Class ZZ Plus plug gage designed for precise go/no-go inspection of machined holes and bores with a nominal diameter of 0.268 inches. Built from steel, it holds a tolerance of 0.0002 inches, making it suitable for production-floor quality control where tight dimensional verification is required. Plug gages of this class are standard tools in machining, toolmaking, and precision manufacturing environments. Inspectors and machinists use them to confirm that drilled, reamed, or bored holes fall within acceptable dimensional limits without the need for complex measurement setups.

This plug gage is used in production inspection and quality assurance applications across machine shops, toolrooms, and manufacturing facilities. It is appropriate for verifying hole diameter conformance on machined components in both light and heavy industry settings. The compact, single-piece design allows for fast, repeatable checks on the production line or at the inspection bench. It is sized for individual use and ships as a single unit.

Key Features

• Class ZZ Plus tolerance rating for go/no-go hole inspection at 0.268 inches diameter
• Tight tolerance of 0.0002 inches for reliable dimensional verification
• Steel construction for durability and wear resistance in production environments
• Compact form factor suited for bench inspection and in-line quality checks
• Single-unit packaging for individual technician or toolroom use

Compatibility

Designed as an OEM-style replacement or direct-use plug gage for inspection of machined holes at 0.268 inches nominal diameter in standard Class ZZ Plus gage applications.

Installation Notes

Plug gages are handled and used by machinists, quality technicians, and toolroom personnel — no power tools or utilities need to be shut down for standard gage use. Keep the gage clean and lightly oiled when not in use to prevent corrosion and maintain accuracy. Do not force the gage into a hole; excessive insertion force can damage both the gage and the workpiece. Store in a protective case away from other metal tools to prevent nicks or surface damage that could affect measurement accuracy.