Spi 616-82962 Class Zz Plug Gage Set 100 Pc 0.301-0.4 in

Product Description

The SPI 616-82962 is a 100-piece Class ZZ double-end plug gage set covering a measurement range of 0.301 to 0.4 inches in diameter. Each gage holds a plus tolerance of 0.0005 inches, meeting Class ZZ standards for go/no-go inspection of drilled, reamed, or bored holes. The set is constructed from steel for durability under repeated shop-floor use. Machinists, quality control technicians, and tool room personnel use plug gage sets like this to verify bore dimensions quickly and accurately without specialized metrology equipment.

This gage set is suited for production inspection environments where high-volume hole verification is required across the 0.301 to 0.4 inch diameter range. The double-end design places the go member on one end and the no-go member on the opposite end, allowing a single gage to perform a complete in-spec check. Typical applications include incoming inspection, in-process verification, and final quality checks on machined components in manufacturing, tooling, and maintenance operations.

Key Features

• 100-piece set covers 0.301 to 0.4 inches diameter range in incremental steps
• Class ZZ tolerance rating with 0.0005 inch plus tolerance per gage
• Double-end design combines go and no-go members on a single gage body
• Steel construction for wear resistance and dimensional stability
• Supports go/no-go inspection without requiring electronic or optical measurement equipment

Compatibility

Designed as a general-purpose Class ZZ plug gage set for go/no-go inspection of holes in the 0.301 to 0.4 inch diameter range, compatible with standard gage handle systems used in machine shops and quality inspection stations.

Installation Notes

Plug gages are handled and used by machinists and quality technicians, not installed in a mechanical system. Store gages in the provided case and apply a light coat of protective oil when not in use to prevent corrosion. Do not force a gage through an undersized bore, as this damages the gage and produces false readings. Calibrate or verify gages against a master ring gage at regular intervals to maintain accuracy.