Spi 29-703-6 Class Zz Plus Plug Gage 0.703 in

Product Description

The SPI 29-703-6 is a Class ZZ Plus plug gage designed for checking the dimensional accuracy of holes and bores with a nominal diameter of 0.703 inches. Class ZZ Plus gages are manufactured to tighter tolerances than standard Class ZZ, with a tolerance of 0.0002 inches, making this tool appropriate for quality control work in machine shops, production environments, and precision fabrication. The gage is constructed from steel for wear resistance and dimensional stability. It is typically used by machinists, quality technicians, and tool-and-die professionals who need fast, reliable GO/NO-GO or diameter verification without relying on a micrometer or caliper for every check.

This plug gage is suited for incoming inspection, in-process gauging, and final inspection of drilled, reamed, or bored holes in metal and plastic components. It is a direct measurement tool used in manufacturing and job-shop settings where hole diameter conformance to a 0.703-inch nominal specification must be confirmed quickly and consistently. Typical applications include aerospace, automotive, general machining, and any production line where hole tolerances are held to close limits.

Key Features

• Nominal measurement diameter of 0.703 inches for precise hole verification
• Class ZZ Plus tolerance of 0.0002 inches for tighter accuracy than standard Class ZZ
• Steel construction for durability and dimensional stability under shop conditions
• Compact form factor at 0.2 pounds for easy hand use during inspection
• Single-piece package quantity suitable for individual bench or field use

Compatibility

Designed as an OEM-style plug gage for use in any inspection or quality-control application requiring verification of a 0.703-inch nominal bore diameter to Class ZZ Plus standards.

Installation Notes

Plug gages do not require installation in the traditional sense, but proper handling is critical to accuracy and longevity. Always clean the gage and the workpiece bore before use to remove chips, coolant, and debris that can cause false readings or accelerated wear. Store the gage in its case or on a padded surface away from other metal tools to prevent nicks. Calibration against a certified master should be performed periodically in accordance with your facility quality plan.