Spi 29-416-5 Class Zz Plus Plug Gage 0.416 Inch

Product Description

The SPI 29-416-5 is a Class ZZ Plus plug gage designed for go/no-go dimensional inspection of bored, drilled, or reamed holes. It measures a nominal diameter of 0.416 inches with a tolerance of 0.0002 inches, making it suitable for precision quality-control work in machine shops, manufacturing facilities, and fabrication environments. Constructed from steel, this gage delivers the rigidity and wear resistance needed for repeated use in production inspection. Machinists, quality technicians, and tool-room professionals use Class ZZ Plus gages as a cost-effective solution for verifying hole sizes to tight dimensional standards.

This plug gage is used in applications where consistent hole diameter verification is required, including CNC machining, general metalworking, and inspection of threaded or smooth bores prior to assembly. It is well suited for incoming material inspection, in-process checks, and final QC verification on steel, aluminum, and similar workpiece materials. The compact form factor makes it easy to handle in both bench and floor inspection environments.

Key Features

• Nominal measurement diameter of 0.416 inches for precise hole inspection
• Tolerance of 0.0002 inches meets Class ZZ Plus gage accuracy requirements
• Steel construction provides durability and resistance to wear during repeated use
• Lightweight at 0.2 pounds for easy one-handed handling during inspection
• Single-piece package quantity supports individual tool procurement

Compatibility

Designed as a standard Class ZZ Plus plug gage for go/no-go inspection of smooth cylindrical holes with a nominal diameter of 0.416 inches in general industrial and manufacturing inspection applications.

Installation Notes

Plug gages are handled and used by quality technicians and machinists and do not require power or mechanical installation. Keep the gage clean and lightly oiled when not in use to prevent corrosion and maintain accuracy. Do not force the gage into an undersized hole, as this can damage the gage land and affect calibration. Store in a protective case away from temperature extremes to preserve dimensional stability.