Spi 29-402-5 Class Zz Plus Plug Gage 0.402 in Steel

Product Description

The SPI 29-402-5 is a Class ZZ Plus plug gage designed to verify inside diameter dimensions with a nominal measurement of 0.402 inches and a tolerance of 0.0002 inches. Machined from steel, this go/no-go style gage gives machinists, quality technicians, and tool-and-die professionals a fast, reliable method for confirming bore conformance on production and inspection work. Class ZZ Plus gages meet recognized tolerance standards for general-purpose inspection, making them a practical choice for shop floor and quality lab environments where accurate hole verification is required.

This plug gage is suited for use in machine shops, manufacturing facilities, and inspection departments where inside diameter verification of drilled, reamed, or bored holes is part of the quality process. It is typically used to confirm that a 0.402-inch nominal bore falls within specified tolerance limits before parts advance to the next stage of production. The compact form factor and steel construction make it easy to handle and durable under regular use.

Key Features

• Nominal measurement diameter of 0.402 inches for precise bore inspection
• Tolerance of 0.0002 inches meets Class ZZ Plus gage accuracy requirements
• Steel construction provides durability and dimensional stability during repeated use
• Lightweight at 0.2 pounds, suitable for handheld shop floor and bench inspection
• Single-piece package quantity supports individual tool procurement and replacement

Compatibility

Designed as a general-purpose plug gage for inside diameter inspection of 0.402-inch nominal bores across standard manufacturing and quality control applications.

Installation Notes

Plug gages are handled by quality technicians and machinists and require no permanent installation. Before use, clean the gage and the bore being checked to remove chips, coolant, or debris that could affect the reading. Do not force the gage into a bore; excessive force can damage the gage land or the part. Store the gage in a protective case away from other tools to prevent surface damage that would affect accuracy.