Spi 19-299-7 Class Zz Minus Plug Pin Gage 0.299 in

Product Description

The SPI 19-299-7 is a Class ZZ minus plug pin gage designed to verify that a hole or bore meets minimum size tolerance. It measures a nominal diameter of 0.299 inches with a tolerance of 0.0002 inches, manufactured from steel for durability in production and inspection environments. Class ZZ gages are the most widely used go/no-go inspection tools in general manufacturing, offering a cost-effective way to confirm dimensional conformance on drilled, reamed, or punched features. Machinists, quality control inspectors, and tool-and-die technicians rely on this gage type for fast, repeatable attribute inspection at the workpiece or incoming inspection station.

This pin gage is suited for use in machine shops, fabrication facilities, and quality inspection labs where hole size verification is a routine task. The minus designation means the gage is ground to the lower boundary of the specified diameter, making it appropriate for go-gage applications where confirming a minimum acceptable hole size is required. It is used across general metalworking, aerospace component inspection, and high-volume production lines where quick manual gauging is preferred over CMM measurement for attribute checks.

Key Features

• Nominal diameter of 0.299 inches for precise hole inspection
• Class ZZ tolerance of 0.0002 inches for general-purpose gauging applications
• Minus designation ground to the lower diameter boundary for go-gage use
• Steel construction provides wear resistance and dimensional stability
• Compact single-pin format for handheld or bench inspection workflows

Compatibility

Designed as an OEM-style replacement or direct-use Class ZZ minus plug gage suitable for any standard pin gage handle or holder accepting 0.299-inch diameter pins in general-purpose dimensional inspection applications.

Installation Notes

Pin gages should be handled with clean, dry hands or lint-free gloves to prevent corrosion from skin oils. Store the gage in a protective case away from other metal tooling to avoid nicks or surface damage that would affect dimensional accuracy. Calibrate or verify the gage against a certified master before placing it into regular service, following your facility inspection and gage control procedures.