Spi 29-593-1 Class Zz Plus Plug Gage 0.593 in

Product Description

The SPI 29-593-1 is a Class ZZ Plus plug gage used to verify the inside diameter of machined bores, drilled holes, and precision-toleranced openings. It measures a nominal diameter of 0.593 inches and holds a tolerance of 0.0002 inches, making it suitable for go/no-go inspection work where tight dimensional control is required. Constructed from steel, this gage is designed for use in shop-floor quality control and inspection environments by machinists, tool and die makers, and quality technicians who need reliable, repeatable inside-diameter verification.

The 29-593-1 is used wherever a 0.593-inch nominal bore must be checked against print tolerances. Typical applications include incoming inspection, in-process gauging on CNC or manual machining operations, and final inspection of precision components. Class ZZ Plus gages are standard instruments in production shops, job shops, and quality labs where dimensional compliance is part of the workflow.

Key Features

• Nominal measurement diameter of 0.593 inches for direct bore inspection
• Class ZZ Plus tolerance of 0.0002 inches for precise go/no-go verification
• Steel construction for durability and dimensional stability in shop environments
• Compact, lightweight design at 0.2 pounds for easy single-handed use
• Single-piece unit — no assembly required before use

Compatibility

Designed as an OEM-style replacement or direct-use plug gage for any application requiring inspection of a 0.593-inch nominal inside diameter to Class ZZ Plus standards.

Installation Notes

Plug gages require no installation but should be handled with clean, dry hands or lint-free gloves to prevent corrosion from skin oils. Before use, clean the gage and the bore being measured with a lint-free cloth to remove chips, coolant, and debris that could affect the reading. Store the gage in a protective case away from other tools to prevent surface damage that would affect dimensional accuracy.