Spi 29-725-9 Class Zz Plus Plug Gage 0.725 in

Product Description

The SPI 29-725-9 is a Class ZZ Plus plug gage designed for verifying hole diameters in precision machining and quality control applications. It measures a nominal diameter of 0.725 inches with a tolerance of 0.0002 inches, making it suitable for go/no-go inspection work where tight dimensional control is required. Constructed from steel for durability and wear resistance, this gage is a standard hand tool for machinists, toolmakers, and quality technicians working on production floors or in inspection departments.

This plug gage is used in manufacturing and machining environments where hole diameter verification is part of the inspection process. It is well suited for incoming inspection, in-process checks, and final part verification. The Class ZZ Plus classification indicates it meets a defined accuracy grade appropriate for general-purpose inspection of production parts. It works with any standard hole or bore that matches its 0.725-inch nominal dimension.

Key Features

• Nominal measurement diameter of 0.725 inches for precise hole inspection
• Tolerance of 0.0002 inches for tight dimensional accuracy
• Steel construction for durability and extended service life
• Class ZZ Plus accuracy grade suited for general-purpose production inspection
• Lightweight at 0.2 pounds for easy single-hand use

Compatibility

Designed as a general-purpose plug gage for inspecting holes with a nominal diameter of 0.725 inches. Suitable for use wherever Class ZZ Plus gage accuracy is specified in the inspection plan.

Installation Notes

Plug gages are handled and used by machinists and quality control technicians following standard metrology practices. Store the gage in its protective case when not in use to prevent damage to the precision ground surface. Clean mating surfaces before use and apply a light film of rust-preventive oil after use to protect the steel from corrosion. Do not force the gage into a bore; excessive insertion force can cause wear and invalidate measurements.