Spi 19-785-5 Class Zz Minus Plug Pin Gage 0.785 in

Product Description

The SPI 19-785-5 is a Class ZZ minus plug pin gage designed to verify bore and hole dimensions with high dimensional accuracy. Built from steel, this pin gage measures a nominal diameter of 0.785 inches and carries a minus tolerance of 0.0002 inches, placing it within the Class ZZ specification for go/no-go inspection work. It is used by machinists, quality control technicians, and toolroom professionals to confirm that drilled, bored, or reamed holes meet drawing tolerances before assembly or final inspection.

This pin gage is suited for use in manufacturing, machine shop, and inspection room environments where precise hole qualification is required. It is appropriate for both production-line spot checks and detailed inspection of machined components. The Class ZZ designation makes it a practical choice for general-purpose inspection rather than high-precision laboratory applications. Technicians working with steel, aluminum, and similar materials will find it fits standard go/no-go gauging workflows.

Key Features

• 0.785 inches nominal diameter for direct bore and hole verification
• Class ZZ minus tolerance of 0.0002 inches for reliable go/no-go inspection
• Steel construction for durability under repeated use
• Compact and lightweight at 0.2 pounds for easy handling
• Single-piece unit ready for immediate use in inspection workflows

Compatibility

Designed as an OEM-style replacement and standard fitment for general-purpose plug pin gage sets requiring a 0.785-inch diameter Class ZZ minus member.

Installation Notes

Pin gages are handled and used by quality control technicians and machinists — no power tools or utility shutoffs are required. Clean the gage and the hole to be inspected before use to prevent debris from affecting readings. Do not force the gage into a bore; forced insertion can damage both the gage and the workpiece. Store in a protective case away from moisture to maintain dimensional integrity.