Spi 19-624-6 Class Zz Minus Plug Pin Gage 0.624 in

Product Description

The SPI 19-624-6 is a Class ZZ minus plug pin gage with a 0.624-inch nominal diameter, manufactured from steel for reliable dimensional verification in production and inspection environments. Class ZZ gages are designed for general-purpose gauging applications where moderate tolerance control is required. This minus-type gage is ground to a tolerance of 0.0002 inches below nominal, making it suitable for go/no-go inspection routines and incoming quality checks. Machinists, quality technicians, and tool room professionals use plug pin gages to verify bore diameters and hole sizes quickly and accurately without specialized metrology equipment.

This gage is appropriate for use in production floor inspection, machine shop quality control, and incoming material verification. The 0.624-inch size serves applications involving bored holes, drilled openings, and reamed passages in metal or plastic workpieces where tight dimensional conformance is required. The steel construction withstands repeated use in typical shop environments.

Key Features

• Class ZZ tolerance class for general-purpose dimensional inspection
• Minus-type designation ground below nominal for go-gage applications
• 0.0002-inch tolerance for reliable pass/fail gauging
• Steel construction for durability under repeated shop use
• 0.624-inch nominal diameter for common bore and hole verification

Compatibility

Designed as a general-purpose plug pin gage suitable for use with standard gage handle holders and gage block accessories compatible with the 0.624-inch diameter class.

Installation Notes

Plug pin gages should be handled and stored carefully to prevent nicks, burrs, or corrosion that could affect measurement accuracy. Clean the gage and the bore to be inspected before use to prevent debris from introducing measurement error. Do not force the gage into an undersized bore, as this can damage both the gage and the workpiece. Periodic calibration against a traceable standard is recommended to maintain inspection integrity.