Spi 19-956-2 Class Zz Minus Plug Pin Gage 0.956 in

Product Description

The SPI 19-956-2 is a Class ZZ minus plug pin gage designed to verify bore and hole diameters to a nominal size of 0.956 inches. Built from steel, this go/no-go style gage member is used in dimensional inspection to confirm that an inside diameter meets minimum tolerance requirements. The minus designation means the gage is manufactured to the low side of the tolerance band, with a tolerance of 0.0002 inches, making it suitable for general-purpose inspection work in machine shops, fabrication facilities, and quality control environments. Machinists, tool and die makers, and QC inspectors use this type of gage as part of routine in-process and final inspection.

Class ZZ plug gages are the standard grade for general shop and inspection use where moderate accuracy is required. This gage is appropriate for checking bored holes, reamed holes, and other cylindrical features across a wide range of manufacturing and maintenance applications. It is commonly used in production settings where quick, repeatable go/no-go verification is needed without the overhead of CMM measurement.

Key Features

• Nominal diameter of 0.956 inches for direct bore verification at that size
• Class ZZ tolerance grade suitable for general-purpose shop inspection
• Minus plug configuration checks the low-limit condition of the tolerance band
• Steel construction for durability and wear resistance in production environments
• Tolerance of 0.0002 inches for reliable dimensional verification

Compatibility

Designed as a general-purpose Class ZZ minus plug gage for use with standard 0.956-inch nominal bore inspections in machining, fabrication, and quality control applications.

Installation Notes

Plug pin gages are handled and used by machinists, toolmakers, and quality control inspectors. Store the gage in a protective case when not in use and keep it clean and lightly oiled to prevent corrosion. Never force a plug gage into a bore; apply only light, consistent hand pressure to avoid wear or damage to the gage or workpiece. Calibrate and re-inspect gages periodically per your facility's gage control program to maintain measurement integrity.