Spi 29-200-3 Class Zz Plus Plug Gage 0.2 Inch

Product Description

The SPI 29-200-3 is a Class ZZ Plus plug gage used to inspect and verify the inside diameter of holes, bores, and machined features to a high degree of accuracy. Manufactured from steel, this go/no-go style precision instrument measures a nominal diameter of 0.2 inches with a tolerance of 0.0002 inches, making it suitable for quality control and inspection work in machine shops, manufacturing facilities, and precision assembly environments. It is typically used by machinists, toolroom technicians, and quality inspectors who need repeatable, traceable dimensional verification of drilled or reamed holes.

This plug gage is suited for dimensional inspection of small-diameter holes in production and job-shop settings. The Class ZZ Plus designation indicates a commercial-grade tolerance class appropriate for checking workpiece tolerances in general manufacturing. It is used wherever tight hole-diameter conformance must be verified before assembly or further machining, including in metalworking, tool and die, and precision parts production.

Key Features

• Nominal measurement diameter of 0.2 inches for small-bore inspection
• Tight tolerance of 0.0002 inches for accurate go/no-go determination
• Steel construction for durability and wear resistance in shop environments
• Class ZZ Plus designation meets commercial-grade gage tolerance standards
• Compact and lightweight at 0.2 pounds for easy handling during inspection

Compatibility

Designed as an OEM-style replacement or direct addition to plug gage sets used for inspecting 0.2-inch nominal diameter holes in general manufacturing and machining applications.

Installation Notes

Plug gages should be handled by trained quality or toolroom personnel following standard metrology practices. Clean the gage and workpiece bore thoroughly before use to prevent debris from affecting readings or causing premature wear. Store the gage in a protective case away from temperature extremes to preserve dimensional accuracy. Periodic calibration against traceable standards is recommended to maintain measurement integrity.