Spi 29-051-0 Class Zz Plus Plug Gage 0.051 in

Product Description

The SPI 29-051-0 is a Class ZZ Plus plug gage designed to verify bore and hole diameters with a nominal measurement diameter of 0.051 inches and a tolerance of 0.0002 inches. Manufactured from steel, this gage provides reliable go/no-go dimensional verification in precision machining, manufacturing, and quality control environments. Class ZZ is the standard commercial tolerance class for plug gages, making this tool appropriate for general inspection work where tight process control is required. Machinists, quality technicians, and tool-room professionals use this type of gage as part of routine dimensional inspection workflows.

This plug gage is suited for small-bore inspection applications in production and job-shop environments. At 0.051 inches in diameter, it falls in the small-pin range commonly needed when verifying drilled, reamed, or punched holes in precision components. It is appropriate for use in metalworking, light manufacturing, and any inspection process requiring traceable dimensional verification at this diameter class.

Key Features

• Nominal measurement diameter of 0.051 inches for small-bore inspection
• Class ZZ Plus tolerance of 0.0002 inches for general commercial inspection work
• Steel construction for durability and dimensional stability
• Single-piece package quantity suited for individual bench or field use
• Compact and lightweight at 0.2 pounds for easy handling during inspection

Compatibility

Designed as an OEM-style replacement or direct-use plug gage for general-purpose bore inspection applications requiring a 0.051-inch diameter Class ZZ Plus gage in steel.

Installation Notes

Plug gages are handled and used by quality technicians and machinists during dimensional inspection procedures. Keep the gage clean and lightly oiled when not in use to prevent corrosion and maintain accuracy. Do not force the gage into a bore, as this can damage both the gage and the workpiece. Store separately from other tooling to avoid nicks or surface damage that would compromise dimensional accuracy.