Spi 19-898-6 Class Zz Minus Plug Pin Gage 0.898 in

Product Description

The SPI 19-898-6 is a Class ZZ minus plug pin gage used to verify hole diameters and bore tolerances in precision machining and inspection applications. Manufactured from steel, this go-no-go style gage is designed for dimensional verification where consistent, repeatable measurement is required. The 0.898-inch nominal diameter and a minus tolerance of 0.000200 inches (0.0002 mm) place it within Class ZZ specifications, the standard for general-purpose inspection gages used in tool rooms, machine shops, and quality control environments. Machinists, quality technicians, and tool-and-die professionals use pin gages like this to confirm that machined holes fall within acceptable dimensional limits before assembly or final inspection.

This pin gage is suited for use in manufacturing facilities, machine shops, and quality assurance departments handling parts that require close-tolerance bore verification. The 0.898-inch diameter makes it appropriate for inspecting medium-range bore sizes in components produced on CNC equipment, conventional lathes, or boring mills. It is commonly used as part of a gage pin set or as a standalone replacement pin when a single diameter needs to be verified in a recurring inspection process.

Key Features

• Class ZZ tolerance class for general-purpose hole and bore inspection
• Minus tolerance designation: 0.000200 inches (0.0002 mm)
• 0.898-inch nominal diameter for medium-range bore verification
• Steel construction for durability in repeated-use inspection environments
• Single-piece packaging suitable for individual replacement or standalone use

Compatibility

Designed as a general-purpose Class ZZ minus plug pin gage for use in standard tool room and production inspection applications requiring a 0.898-inch nominal bore diameter check.

Installation Notes

Pin gages are handled and used by quality technicians and machinists during inspection, not installation into a mechanical system. Clean the gage and the bore to be checked before use to prevent debris from affecting measurement accuracy. Never force a plug gage into a hole; if resistance is felt, the bore may be undersize or contain burrs that require attention. Store pin gages in a protective case away from other metal tools to prevent surface damage that could compromise measurement accuracy.