Spi 29-635-0 Class Zz Plus Plug Gage 0.635 in

Product Description

The SPI 29-635-0 is a Class ZZ Plus plug gage used to verify bore diameters in precision inspection and quality control applications. It measures a nominal diameter of 0.635 inches with a tolerance of 0.0002 inches, making it suitable for go/no-go gauging tasks where tight dimensional control is required. Constructed from steel, this plug gage is built to withstand repeated use in shop-floor and inspection-room environments. Machinists, tool-and-die technicians, and quality control inspectors rely on this type of gage to confirm that drilled, reamed, or bored holes meet print specifications before parts move to the next stage of production.

This plug gage is appropriate for use in manufacturing, fabrication, and machine shop environments where hole diameter verification at 0.635 inches is required. It suits both incoming inspection of raw components and in-process checks on machined parts. The Class ZZ Plus designation indicates a standard-grade tolerance class, making this gage a practical choice for general industrial inspection rather than ultra-precision laboratory use.

Key Features

• Nominal measurement diameter of 0.635 inches for direct bore verification
• Tolerance of 0.0002 inches provides reliable go/no-go inspection capability
• Steel construction for durability in shop-floor and inspection environments
• Class ZZ Plus designation suits general industrial quality control applications
• Compact and lightweight at 0.2 pounds for easy single-hand use

Compatibility

Designed as a standard Class ZZ Plus plug gage for verifying 0.635-inch bore diameters in general industrial inspection applications.

Installation Notes

Plug gages should be handled and stored carefully to prevent damage to the gauging surface, as nicks or corrosion will affect measurement accuracy. Clean the bore and gage surfaces before use to remove chips, coolant, and debris. Allow the gage and workpiece to reach the same ambient temperature before measuring to avoid thermal expansion errors. Follow your facility's gage calibration schedule and handle with clean gloves or a gage cloth to prevent hand oils from affecting the surface finish.