Spi 19-838-2 Class Zz Minus Plug Pin Gage 0.838 in

Product Description

The SPI 19-838-2 is a Class ZZ minus plug pin gage machined from steel, used to verify that a hole or bore falls within its specified dimensional tolerance. This gage is built to Class ZZ standards, the most widely used accuracy class for general-purpose go/no-go and inspection work in manufacturing, machining, and quality control environments. At 0.838 inches in diameter with a minus tolerance of 0.000200 inches, it provides reliable, repeatable measurement for hole acceptance checks. Metrology technicians, machinists, and quality inspectors are the primary users of this tool.

This plug pin gage is suited for use in machine shops, production lines, and inspection departments where bore and hole diameter verification is required. It is appropriate for checking drilled, reamed, or bored holes in metal components where dimensional accuracy must be confirmed before assembly. The Class ZZ designation makes it a fit for general inspection use rather than high-precision laboratory-grade applications.

Key Features

• Class ZZ accuracy class for general-purpose hole inspection
• Minus tolerance configuration at 0.000200 inches for reliable no-go checking
• 0.838 inch nominal diameter
• Steel construction for durability and wear resistance in shop environments
• Single-piece package quantity suitable for individual inspector or bench use

Compatibility

Designed as a general-purpose Class ZZ minus plug gage for use with standard go/no-go gage handles and holders sized for 0.838 inch diameter gage pins.

Installation Notes

Plug pin gages are handled and used by machinists and quality control technicians following standard metrology practice. Store the gage in a protective case and apply a light coat of oil when not in use to prevent corrosion. Clean both the gage and the hole being checked before use to ensure accurate readings. Avoid dropping or striking the gage, as impact can alter the ground surface and invalidate measurements.