Spi 19-479-5 Class Zz Minus Plug Pin Gage 0.479 in

Product Description

The SPI 19-479-5 is a Class ZZ minus plug pin gage ground to a 0.479 inch nominal diameter with a minus tolerance of 0.0002 inches. Pin gages are precision go/no-go measurement tools used to verify hole diameters, slot widths, and bore sizes to a known dimensional standard. This gage is machined from steel and held to Class ZZ tolerances, which are the standard for general-purpose inspection and production floor use. Machinists, quality technicians, and tool-and-die professionals use plug gages like this one to confirm that drilled, reamed, or bored features fall within acceptable dimensional limits before parts move to the next operation.

This gage is suited for use in machine shops, fabrication facilities, and inspection departments where hole-size verification is part of a standard quality control workflow. The 0.479 inch diameter and Class ZZ minus tolerance make it appropriate for checking features produced to close dimensional callouts. It is a single-pin gage intended for bench use or in-process inspection. The compact size and light weight at 0.2 pounds make it easy to handle during repetitive inspection tasks.

Key Features

• Class ZZ minus tolerance: 0.0002 inches for general-purpose inspection accuracy
• Nominal diameter of 0.479 inches for precise hole and bore verification
• Steel construction for durability and dimensional stability during repeated use
• Lightweight at 0.2 pounds, suitable for bench and floor inspection tasks
• Minus designation indicates the gage is ground below nominal, consistent with go-gage applications

Compatibility

Designed as an OEM-style replacement or direct-use plug pin gage for any inspection setup requiring a Class ZZ minus gage at 0.479 inch nominal diameter. Compatible with standard gage handle sets that accept the appropriate shank size for this diameter range.

Installation Notes

Plug pin gages require no installation but should be handled and stored according to standard metrology practices. Keep the gage surface clean and lightly oiled to prevent corrosion and maintain dimensional integrity. Do not force the gage into a feature; apply only light hand pressure to avoid burring or deflecting the gage pin. Calibration interval should follow your facility's quality management procedures or applicable ASME B89 standards.