Spi 19-120-5 Class Zz Minus Plug Pin Gage 0.1200 in

Product Description

The SPI 19-120-5 is a Class ZZ minus plug pin gage machined from steel, designed to verify the minimum acceptable size of a drilled, reamed, or bored hole. With a nominal diameter of 0.1200 inches and a tolerance of 0.0002 inches, this gage provides a reliable go/no-go reference for precision inspection work. Class ZZ is the standard grade for general shop-floor and production inspection where high-volume checking is required. Machinists, quality technicians, and tool-and-die professionals use plug gages like this to confirm dimensional conformance without relying on variable measuring instruments.

This gage is suited for production floor inspection, incoming material inspection, and quality control applications across machining, fabrication, and manufacturing environments. It is used to check holes in metal components, plastic parts, and other machined workpieces where tight tolerances must be verified. The 0.1200-inch diameter makes it appropriate for small-bore inspection tasks common in precision machining operations.

Key Features

• Class ZZ minus tolerance — standard grade for production and shop-floor go/no-go inspection
• Nominal diameter of 0.1200 inches for small-bore hole verification
• Tolerance of 0.0002 inches ensures consistent, repeatable measurement reference
• Steel construction for durability and wear resistance in production environments
• Compact, single-piece design suited for manual inspection tasks

Compatibility

Designed as an OEM-style replacement or direct-use plug pin gage for general precision inspection applications requiring a Class ZZ minus gage at 0.1200 inches nominal diameter.

Installation Notes

Plug pin gages are used by quality control technicians and machinists and require no permanent installation. Before use, clean both the gage and the workpiece hole to remove chips, coolant, and debris that could affect readings. Store the gage in its protective case when not in use to prevent nicks or corrosion that could compromise accuracy. Periodic recalibration against a traceable standard is recommended to maintain inspection integrity.