Spi 19-413-4 Class Zz Minus Plug Gage 0.413 in

Product Description

The SPI 19-413-4 is a Class ZZ minus plug pin gage with a nominal diameter of 0.413 inches, manufactured from steel. Plug pin gages are precision measurement tools used to verify that a drilled, reamed, or bored hole falls within a specified dimensional tolerance. The minus designation means the gage is ground to the low side of the nominal size, allowing it to serve as a go-or-no-go reference for inspection work. This gage carries a tolerance of 0.000200 inches, consistent with Class ZZ standards for general-purpose inspection. It is used by machinists, quality control inspectors, and tool-and-die professionals.

Class ZZ plug gages are suited for production floor inspection and general-purpose dimensional verification in manufacturing and fabrication environments. The 0.413-inch diameter targets holes of that nominal size in steel, aluminum, plastic, and other workpiece materials. This gage is appropriate for shops performing incoming inspection, in-process checks, or final verification of drilled and reamed hole dimensions. The compact, single-pin format allows fast, repeatable checks without requiring dedicated gauging fixtures.

Key Features

• Class ZZ tolerance class for general-purpose hole inspection
• Minus configuration ground to the low side of nominal diameter
• 0.000200-inch tolerance for reliable go-or-no-go measurement
• Steel construction for durability and wear resistance
• 0.413-inch nominal diameter for matching hole specifications

Compatibility

Designed as a general-purpose Class ZZ plug pin gage for verifying 0.413-inch nominal diameter holes in standard machining and inspection applications.

Installation Notes

Plug pin gages are handled and used by machinists and quality control inspectors; no installation in a mechanical system is required. Keep the gage clean and lightly oiled when not in use to prevent corrosion and maintain calibration integrity. Do not force the gage into a hole — if resistance is felt, the hole is undersize and the gage should be withdrawn without applying pressure. Store in a protective case away from temperature extremes to prevent dimensional drift.