Spi 29-497-5 Class Zz Plus Plug Gage 0.497 in

Product Description

The SPI 29-497-5 is a Class ZZ Plus plug gage used to verify inside diameter tolerances in production and inspection environments. Built to Class ZZ Plus standards, it provides a no-go or go reference for hole sizes at exactly 0.497 inches with a tolerance of 0.0002 inches. The steel construction gives it the durability needed for repeated use on the shop floor or in a quality control station. Machinists, toolroom technicians, and quality inspectors rely on plug gages like this one to confirm that bored, drilled, or reamed holes meet specification before parts move to the next stage of production.

This plug gage is suited for use in precision machining shops, manufacturing facilities, and inspection departments where consistent hole diameter verification is required. It handles light to moderate inspection volume and is appropriate for any application where a 0.497-inch nominal bore diameter must be held to close tolerance. The compact, single-piece form factor makes it easy to store and retrieve in a gage crib or toolbox.

Key Features

• Class ZZ Plus tolerance classification for general-purpose production inspection
• 0.497-inch nominal measurement diameter
• 0.0002-inch tolerance for precise go or no-go verification
• Steel construction for wear resistance and dimensional stability
• Lightweight at 0.2 pounds for easy single-hand use

Compatibility

Designed as a standard Class ZZ Plus plug gage for use wherever a 0.497-inch inside diameter inspection reference is required in general machining and manufacturing inspection applications.

Installation Notes

Plug gages require no installation but should be handled with clean, dry hands or lint-free gloves to prevent corrosion and contamination of the gage surface. Before use, verify the gage is clean and free of burrs or debris that could affect measurement accuracy. Store in a protective case or gage crib away from other metal tools to prevent damage to the precision surface. Calibration intervals should follow your facility quality management plan or applicable metrology standards.