Spi 29-596-4 Class Zz Plus Plug Gage 0.596 in

Product Description

The SPI 29-596-4 is a Class ZZ Plus plug gage designed for go/no-go dimensional inspection of bored holes, drilled passages, and machined features with a nominal diameter of 0.596 inches. Built to Class ZZ tolerance standards, it carries a tolerance of 0.0002 inches, making it appropriate for general-purpose inspection work where high-volume checking is required. The gage body is steel construction, providing the durability needed for regular shop-floor use. Machinists, quality technicians, and tool-and-die professionals use plug gages like this one to verify that a hole or bore falls within the specified dimensional range without the need for direct measurement instrumentation.

This plug gage is suited for use in manufacturing, machining, and production environments where consistent hole-size verification is part of the quality control workflow. It is commonly used in machine shops, fabrication facilities, and assembly operations that require repeatable go/no-go checks on drilled or reamed holes at the 0.596-inch diameter size. The compact size and lightweight design allow it to be handled easily during high-cycle inspection tasks.

Key Features

• Class ZZ Plus tolerance rating — 0.0002 inches tolerance for general-purpose inspection
• 0.596-inch nominal diameter for direct hole-size verification
• Steel construction for shop-floor durability
• Lightweight at 0.2 pounds — easy to handle during repetitive checks
• Go/no-go design simplifies pass-fail dimensional inspection

Compatibility

Designed as a general-purpose Class ZZ plug gage for verifying holes and bores at a 0.596-inch nominal diameter in standard machining and inspection applications.

Installation Notes

Plug gages are handled and used by machinists and quality control technicians — no installation in the traditional sense is required. Store the gage in a clean, dry location away from other tooling to prevent contact damage to the precision ground surfaces. Do not force the gage into an undersized hole; forcing can damage both the gage and the workpiece. Clean the gage and the bore being checked before use to ensure accurate readings.