Spi 19-244-3 Class Zz Minus Plug Pin Gage 0.244 in

Product Description

The SPI 19-244-3 is a Class ZZ minus plug pin gage with a 0.244-inch diameter, used to verify that a hole or bore meets minimum acceptable size tolerances. The gage is manufactured from steel and holds a tolerance of 0.0002 inches, making it suitable for go/no-go inspection work in precision machining, fabrication, and quality control environments. Class ZZ gages are designed for general-purpose inspection use. Licensed machinists, QC inspectors, and tool-room technicians are the primary users of this gage.

This plug pin gage is applied in shop-floor and inspection environments where bore diameter verification is required. It is well suited for checking drilled, reamed, or punched holes in production parts where dimensional compliance must be confirmed before assembly. The minus designation means the gage is manufactured to the lower end of the tolerance band, providing a consistent and repeatable reference for minimum hole acceptance.

Key Features

• Class ZZ tolerance grade for general-purpose dimensional inspection
• Minus designation for lower-limit tolerance verification
• 0.244-inch nominal diameter for precise bore checking
• 0.0002-inch tolerance for reliable go/no-go inspection accuracy
• Steel construction for durability in production environments

Compatibility

Designed as an OEM-style replacement or standard addition to Class ZZ plug gage sets used in general-purpose machining and quality inspection applications.

Installation Notes

Plug pin gages are handled and used by QC inspectors and machinists and require no permanent installation. Always clean the gage and the bore being checked before use to prevent measurement error from debris or oil film. Store gages in a protective case away from other metal tools to prevent nicking the gage surface. Handle with care to avoid dropping, which can alter the gage diameter and compromise accuracy.