Spi 19-074-4 Class Zz Minus Plug Pin Gage 0.074 in

Product Description

The SPI 19-074-4 is a Class ZZ minus plug pin gage used to verify hole diameters to a precise tolerance in machining and inspection applications. This pin gage measures 0.074 inches in diameter and holds a minus tolerance of 0.0002 inches, making it suitable for go/no-go gauging workflows where dimensional accuracy is critical. Constructed from steel, it delivers the hardness and wear resistance required for repeated use in production and quality-control environments. Machinists, tool and die makers, and quality inspectors use this type of gage to confirm bore sizes meet drawing specifications before parts move to the next stage of assembly.

This pin gage is used in shop-floor and inspection-lab settings wherever hole diameter verification is required. Typical applications include checking drilled, reamed, or punched holes in metal and plastic components. The 0.074-inch diameter targets small-bore work common in precision machining, instrument manufacturing, and close-tolerance fabrication. It is handled as a single unit and is well suited for benchtop inspection tasks as well as in-process checks at the machine.

Key Features

• Class ZZ minus tolerance of 0.0002 inches for precise go/no-go dimensional verification
• 0.074-inch diameter targets small-bore inspection requirements
• Steel construction provides hardness and resistance to wear over repeated use
• Lightweight at 0.2 pounds for easy single-hand handling during inspection
• Single-piece packaging supports individual gage management within a set

Compatibility

Designed as a standard Class ZZ minus plug pin gage for use in go/no-go gage sets and individual hole-diameter inspection procedures across general precision machining and quality-control applications.

Installation Notes

Pin gages are handled by metrology technicians, machinists, and quality inspectors and require no installation in the traditional sense. Store gages in a protective case away from moisture and debris to prevent corrosion and dimensional drift. Clean the gage and the bore being checked before use to avoid false readings caused by contamination. Handle with clean, dry hands or cotton gloves to protect the surface finish and prevent oxidation.