Spi 19-204-7 Class Zz Minus Plug Pin Gage 0.204 in

Product Description

The SPI 19-204-7 is a Class ZZ minus plug pin gage used to verify bore and hole diameters in precision machining and inspection work. Manufactured from steel, it checks a nominal diameter of 0.204 inches with a minus tolerance of 0.0002 inches, confirming that a feature meets its minimum acceptable size. Class ZZ gages are the standard go/no-go reference tool used in production environments, tool rooms, and quality control stations. Machinists, quality technicians, and tool and die professionals rely on this type of gage for fast, repeatable dimensional checks without the need for calibrated measuring instruments at every station.

This pin gage is suited for use in any production or inspection environment where hole diameter verification is required. Typical applications include checking drilled, reamed, or punched holes in metal, plastic, and composite workpieces. The 0.204-inch diameter makes it appropriate for small-bore inspection common in precision component manufacturing, aerospace fabrication, and general machining shops. It is used as part of a complete pin gage set or as an individual replacement or supplemental gage for a specific diameter.

Key Features

• Class ZZ minus tolerance for go/no-go hole diameter verification
• 0.204-inch nominal diameter with a 0.0002-inch minus tolerance
• Steel construction for durability in production and inspection environments
• Compact single-pin format suitable for use with standard pin gage handles
• Consistent with ASME B89.1.5 Class ZZ gage standards for dimensional inspection

Compatibility

Designed as an OEM-style replacement or supplemental pin gage for use with standard plug gage handles accepting 0.204-inch diameter pin gages in Class ZZ minus configurations.

Installation Notes

Pin gages should be inserted into a clean, dry gage handle before use. Always clean the bore and the gage pin with a lint-free cloth before measurement to prevent contamination from affecting the reading. Store pin gages in a protective case away from moisture and temperature extremes to maintain dimensional accuracy. Inspection personnel should verify gage calibration status before use in critical quality control applications.