Spi 29-753-1 Class Zz Plus Plug Gage 0.753 in

Product Description

The SPI 29-753-1 is a Class ZZ Plus plug gage designed to verify bore and hole diameters with a nominal measurement diameter of 0.753 inches and a tolerance of 0.0002 inches. Built from steel for durability in shop environments, this gage provides a go/no-go reference for quality control and inspection work. Machinists, toolmakers, and quality technicians use Class ZZ plug gages to confirm that machined holes fall within specified dimensional limits. The tight 0.0002-inch tolerance makes this gage suitable for standard precision inspection tasks in manufacturing and machining operations.

Class ZZ Plus plug gages are used across general manufacturing, machine shops, and production floor inspection stations. This gage is appropriate for checking through-holes, blind holes, and bores in metal and plastic components where a nominal diameter of 0.753 inches must be verified. It is commonly used in both incoming inspection and in-process quality checks on machined parts.

Key Features

• Nominal measurement diameter of 0.753 inches for precise bore verification
• Class ZZ Plus tolerance of 0.0002 inches for standard precision inspection
• Steel construction for wear resistance in production environments
• Go/no-go functionality supports fast, repeatable dimensional checks
• Single-piece package quantity for individual replacement or toolbox stocking

Compatibility

Designed as an OEM-style replacement or supplemental gage for standard Class ZZ plug gage sets requiring a 0.753-inch diameter member.

Installation Notes

Plug gages require no installation but should be handled and stored carefully to prevent damage to the gage surface. Clean the gage and the bore being measured before use to remove chips, coolant, or debris that could affect accuracy. Allow both the gage and the workpiece to reach the same ambient temperature before measuring to avoid thermal expansion errors. Calibration and periodic inspection against traceable standards is recommended per your facility quality plan.