Spi 29-533-7 Class Zz Plus Plug Gage 0.533 in

Product Description

The SPI 29-533-7 is a Class ZZ Plus plug gage designed to verify bore and hole diameters to a nominal size of 0.533 inches with a tolerance of 0.0002 inches. Built from steel, this go/no-go style gage provides a reliable, repeatable check for dimensional accuracy in production and inspection environments. Class ZZ Plus gages meet established tolerance standards for fixed-limit plug gages, making them a standard tool in quality control workflows. Machinists, toolmakers, and QC inspectors use this type of gage for in-process and final inspection of drilled, reamed, or bored holes.

This plug gage is suited for shop floor and inspection room use where hole diameter verification at 0.533 inches is required. It is appropriate for both job shop and production settings. The compact form factor and single-piece construction make it easy to handle during routine inspection checks. This gage is sized for applications where tight dimensional control is critical, such as precision machining, fixture building, and component acceptance testing.

Key Features

• Nominal diameter of 0.533 inches for direct bore verification
• Class ZZ Plus tolerance of 0.0002 inches for precise dimensional control
• Steel construction for durability and wear resistance in shop environments
• Single-piece fixed-limit design for fast, repeatable go/no-go checks
• Lightweight at 0.2 pounds for easy single-hand use during inspection

Compatibility

Designed as an OEM-style fixed-limit plug gage for use in standard bore inspection applications requiring a 0.533-inch nominal diameter at Class ZZ Plus tolerance.

Installation Notes

Plug gages are handled and used by machinists, toolmakers, and quality control technicians. Always clean the gage and the bore being checked before use to remove chips, coolant, and debris that could affect measurement accuracy. Do not force the gage into a bore; excessive force can damage the gage surface and produce false readings. Store the gage in its protective case when not in use to prevent nicks and corrosion that would compromise its calibrated tolerance.