Spi 19-723-6 Class Zz Minus Plug Pin Gage 0.7230 in

Product Description

The SPI 19-723-6 is a Class ZZ minus plug pin gage machined to a nominal diameter of 0.7230 inches with a minus tolerance of 0.0002 inches. Plug pin gages are precision go/no-go measurement tools used to verify that a bored or drilled hole falls within a specified dimensional tolerance. This gage is constructed from steel for durability and dimensional stability under repeated use. Machinists, tool-and-die makers, and quality-control inspectors use plug gages as part of in-process and final inspection routines in manufacturing and fabrication environments.

This gage is suited for shop-floor and inspection-room applications where hole diameter conformance must be verified quickly and reliably. The Class ZZ designation indicates a commercial-grade tolerance class appropriate for general production inspection work. The minus designation means the gage is manufactured to the lower end of the specified tolerance range, which is standard practice for go-gage members used to confirm minimum acceptable hole size. Single-piece packaging makes it practical for adding to an individual gage set or replacing a worn member.

Key Features

• Nominal measurement diameter of 0.7230 inches for precise hole verification
• Class ZZ tolerance class rated for general production and commercial inspection use
• Minus tolerance of 0.0002 inches machined to the lower tolerance boundary
• Steel construction provides wear resistance and long service life under repeated use
• Single-piece unit weight of 0.2 pounds for easy hand use and portability

Compatibility

Designed as a standard plug pin gage for use in any inspection application requiring verification of a 0.7230-inch nominal hole diameter to Class ZZ commercial tolerances.

Installation Notes

Plug pin gages are handled and used by machinists and quality-control inspectors and do not require installation in the traditional sense. Ensure the gage and workpiece are at the same ambient temperature before measurement to avoid thermal expansion errors. Clean both the gage and the hole being measured before use to prevent debris from affecting readings or causing gage wear. Store the gage in a protective case away from moisture and contaminants to maintain dimensional accuracy over time.