Spi 29-597-2 Class Zz Plus Plug Gage 0.597 in Steel

Product Description

The SPI 29-597-2 is a Class ZZ Plus plug gage designed to verify the inside diameter of bores, holes, and machined features to a nominal size of 0.597 inches. Built from steel, this gage delivers a tolerance of 0.0002 inches, making it suitable for dimensional inspection tasks in machine shops, manufacturing facilities, and quality-control environments. Machinists, toolroom technicians, and QC inspectors use plug gages like this one to confirm that drilled or reamed holes fall within specified dimensional limits. The Class ZZ designation indicates a standard commercial tolerance grade appropriate for general inspection work.

This plug gage is intended for use in precision measurement applications where inside diameter verification is required. It suits production floor inspection of drilled, reamed, or bored holes in metal components. The 0.597-inch nominal diameter targets specific bore sizes common in machined parts and assemblies. Its compact, lightweight form allows easy handling during routine inspection cycles.

Key Features

• Nominal measurement diameter of 0.597 inches for precise bore verification
• Class ZZ Plus tolerance of 0.0002 inches for reliable dimensional inspection
• Steel construction provides durability and wear resistance during repeated use
• Lightweight at 0.2 pounds for easy one-handed handling at the inspection point
• Single-piece package quantity suitable for individual workstation or toolroom use

Compatibility

Designed as an OEM-style replacement or direct-use plug gage for general-purpose bore inspection of 0.597-inch nominal diameter features in machined metal components.

Installation Notes

Plug gages are handled and used by machinists, toolroom technicians, and quality-control inspectors — no power tools or electrical lockout procedures are required. Before use, clean the gage and the bore being measured to remove chips, coolant, and debris that could affect accuracy. Apply light gage oil when appropriate to reduce wear on the gage surface. Store the gage in its case or on a padded surface away from impact hazards to preserve its tolerance integrity.