Spi 29-751-5 Class Zz Plus Plug Gage 0.751 in Dia

Product Description

The SPI 29-751-5 is a Class ZZ Plus plug gage used to verify the inside diameter of machined holes and bores. It is a go/no-go style precision measurement tool manufactured to Class ZZ tolerances, with a measuring diameter of 0.751 inches and a tolerance of 0.0002 inches. Constructed from steel, it is built to provide consistent, repeatable measurements in shop-floor environments. Machinists, quality control technicians, and tool-and-die professionals use plug gages like this to confirm that drilled, reamed, or bored holes fall within specified dimensional limits before parts proceed to assembly.

This plug gage is suited for use in manufacturing, machining, and inspection environments where hole diameter verification is required. It is appropriate for both production-line inspection and toolroom quality checks. The 0.751-inch diameter makes it a direct-fit measurement tool for holes held to that nominal size. It is typically used in light industrial and precision machining applications where dimensional accuracy is critical to part function and fit.

Key Features

• Measuring diameter of 0.751 inches for direct hole verification at that nominal size
• Class ZZ Plus tolerance rating of 0.0002 inches for precision inspection use
• Steel construction for durability and dimensional stability in shop environments
• Compact and lightweight at 0.2 pounds for easy handling during inspection
• Single-piece package quantity suitable for individual workstation or toolroom use

Compatibility

Designed as a precision inspection gage for machined holes and bores held to a 0.751-inch nominal diameter in standard manufacturing and toolroom applications.

Installation Notes

Plug gages are used by machinists and quality control inspectors and require no installation in the traditional sense. Ensure the gage and workpiece are at the same ambient temperature before measuring to avoid thermal expansion errors. Clean both the gage and the hole being checked before use to prevent debris from affecting measurement accuracy. Handle with care and store in a protective case when not in use to preserve the precision ground surface.