Spi 29-627-7 Class Zz Plus Plug Gage 0.627 in

Product Description

The SPI 29-627-7 is a Class ZZ Plus plug gage designed to verify bore and hole diameters to a nominal size of 0.627 inches with a tolerance of 0.0002 inches. Built from steel, this go/no-go style gage gives machinists, toolmakers, and quality control technicians a reliable, hands-on method for confirming whether a drilled or bored hole falls within spec. Class ZZ Plus gages meet standard tolerance grades used in production inspection, making this gage a practical choice for shop-floor and incoming inspection work.

This plug gage is used in machine shops, manufacturing facilities, and maintenance environments where hole diameter verification is part of a standard inspection routine. It is suited for checking bores in metal, plastic, and composite workpieces. The 0.627-inch nominal diameter covers a common range of drilled and reamed hole sizes found in general manufacturing and mechanical assembly applications.

Key Features

• Nominal measurement diameter of 0.627 inches for precise bore verification
• Class ZZ Plus tolerance rating at 0.0002 inches for production-grade inspection
• Steel construction for durability and dimensional stability under shop conditions
• Compact and lightweight at 0.2 pounds for easy single-hand use
• Single-piece package quantity ready for immediate deployment

Compatibility

Designed as a standard Class ZZ Plus plug gage for use in general production inspection of bored and drilled holes with a nominal diameter of 0.627 inches.

Installation Notes

Plug gages are used by machinists and quality control personnel and require no installation in the traditional sense. Before use, clean the gage and the bore being checked to remove chips, coolant, and debris that could affect the reading. Do not force the gage into a hole; apply only light, consistent hand pressure to avoid wear on the gage or damage to the workpiece. Store the gage in a protective case and handle it with clean hands or lint-free gloves to prevent corrosion and dimensional changes from heat transfer.