Spi 19-920-8 Class Zz Minus Plug Pin Gage 0.92 in

Product Description

The SPI 19-920-8 is a Class ZZ minus plug pin gage used to inspect and verify hole diameters with precision. Manufactured from steel, this go/no-go style gage is designed for dimensional inspection tasks requiring tight tolerance control. It measures a nominal diameter of 0.92 inches with a minus tolerance of 0.0002 inches, making it well-suited for production floor inspection, incoming quality control, and toolroom verification work. Machinists, quality technicians, and tool-and-die professionals rely on Class ZZ plug gages for repeatable, cost-effective hole inspection in metal fabrication and manufacturing environments.

This plug pin gage is used in inspection and quality assurance applications where hole size must be confirmed to close tolerances. It is appropriate for both job shop and production environments handling ferrous and non-ferrous machined components. The 0.92-inch diameter range and Class ZZ classification make it a standard choice for checking drilled, reamed, or bored holes in mechanical assemblies and machined parts.

Key Features

• Class ZZ tolerance classification for general-purpose dimensional inspection
• Minus plug configuration checks that holes are not undersized
• 0.92-inch nominal diameter for consistent hole verification
• Tolerance of 0.0002 inches for reliable, repeatable measurement
• Steel construction provides durability under regular inspection use

Compatibility

Designed as a general-purpose Class ZZ minus plug pin gage suitable for dimensional inspection of 0.92-inch nominal diameter holes in machined components across manufacturing and toolroom applications.

Installation Notes

Plug pin gages are handled and used by quality technicians and machinists and require no permanent installation. Before use, clean the gage and workpiece bore thoroughly to remove chips, oil, or debris that could affect measurement accuracy. Store the gage in its protective case when not in use to prevent wear and corrosion on the precision ground surface. Handle with care to avoid dropping, as impact damage can alter the gage diameter and render measurements unreliable.