Spi 29-292-0 Class Zz Plus Plug Gage 0.292 in

Product Description

The SPI 29-292-0 is a Class ZZ Plus plug gage designed to verify the diameter of precision bores and holes at 0.292 inches. Built from steel, this fixed-limit gage provides a reliable go/no-go reference for dimensional inspection on the shop floor or in a quality control environment. It carries a tolerance of 0.0002 inches, meeting Class ZZ Plus standards for dimensional accuracy. Machinists, tool and die makers, and quality technicians use this type of gage to confirm that drilled, reamed, or bored features fall within specification before parts move to the next production stage.

This plug gage is suited for use in manufacturing, machining, and fabrication settings where hole diameter verification is part of standard inspection practice. It is appropriate for both production floor checks and incoming or outgoing quality inspection. The 0.292-inch nominal diameter makes it a common fit for applications involving precision-drilled pilot holes, tapped hole prep verification, and similar close-tolerance features in light industrial and general machining work.

Key Features

• Class ZZ Plus tolerance grade at 0.0002 inches for reliable fixed-limit inspection
• 0.292-inch nominal measurement diameter for precision bore verification
• Steel construction for durability in shop and inspection environments
• Compact and lightweight at 0.2 pounds for easy single-hand use
• Single-piece packaging suitable for individual replacement or bench stocking

Compatibility

Designed as an OEM-style fixed-limit inspection gage for use in any application requiring go/no-go hole diameter verification at 0.292 inches to Class ZZ Plus standards.

Installation Notes

Plug gages do not require installation but should be handled and stored carefully to prevent wear or damage to the gaging surfaces. Clean the bore and gage surface before use to ensure accurate readings. Do not force the gage into an undersized hole, as this will damage the gage and compromise its calibration. Periodic calibration against a traceable standard is recommended to maintain measurement integrity.