Spi 19-323-5 Class Zz Minus Plug Pin Gage 0.323 in

Product Description

The SPI 19-323-5 is a Class ZZ minus plug pin gage machined from steel and used to verify bore and hole diameters to a high degree of precision. The gage measures 0.323 inches in diameter and carries a minus tolerance of 0.0002 inches, placing it within the Class ZZ tolerance class defined by ANSI standards for go/no-go dimensional inspection. Plug pin gages of this type are used by machinists, quality control technicians, and tool-and-die professionals to confirm that a hole falls within a specified tolerance range before a part advances in production.

This gage is suited for use in manufacturing, machine shops, and quality inspection environments where precise bore verification is required. It is a single gage element intended for use in go/no-go inspection routines or as a standalone check gage. Class ZZ gages are generally used for inspection of production parts where tight tolerance verification is required. The steel construction provides durability and dimensional stability under normal shop-floor handling conditions.

Key Features

• 0.323-inch nominal diameter for precise bore inspection
• Class ZZ minus tolerance of 0.0002 inches per ANSI standards
• Steel construction for dimensional stability and durability
• Single-piece plug gage design for straightforward go/no-go inspection use
• Lightweight at 0.2 pounds for easy one-hand handling during inspection

Compatibility

Designed as a go/no-go style plug pin gage for use in standard bore and hole inspection applications requiring a 0.323-inch diameter Class ZZ minus tolerance element.

Installation Notes

Plug pin gages should be handled with clean, dry hands or cotton inspection gloves to prevent corrosion from skin oils. Before use, verify the gage and workpiece are at the same ambient temperature to avoid thermal expansion error. Do not force the gage into a bore; if resistance is felt, the hole is undersized or contains burrs that must be addressed before inspection proceeds. Store the gage in its case when not in use to protect the precision ground surface.