Spi 19-814-3 Class Zz Minus Plug Pin Gage 0.814 in

Product Description

The SPI 19-814-3 is a Class ZZ minus plug pin gage used to check hole diameters and bore sizes to a precise standard. It is machined from steel and holds a tolerance of 0.0002 inches, making it suitable for go/no-go inspection work in manufacturing, machining, and quality control environments. The minus designation means the gage is manufactured to the lower end of the tolerance range, which is standard for plug gages used to verify minimum hole size acceptance. Machinists, tool-and-die technicians, and quality inspectors rely on this type of gage for repeatable dimensional verification.

This plug pin gage is sized at 0.814 inches in diameter and is used in dimensional inspection applications where hole tolerance verification is required. It is appropriate for use on production floors, in metrology labs, and in inspection departments wherever bore size conformance must be confirmed against a known standard. It is a single-piece gage used as part of a go/no-go inspection workflow.

Key Features

• Class ZZ tolerance class for general-purpose inspection use
• Minus designation for lower-end tolerance manufacturing, standard for go/no-go plug gage applications
• 0.0002 inch tolerance for precise dimensional verification
• Steel construction for durability and dimensional stability
• 0.814 inch nominal diameter

Compatibility

Designed for use as a general-purpose plug pin gage in dimensional inspection setups where a 0.814 inch diameter Class ZZ minus standard is required.

Installation Notes

Plug pin gages are handled by machinists and quality inspection personnel, not field trades. Keep the gage clean and lightly oiled when stored to prevent corrosion and protect the precision surface. Do not force the gage into a bore. Inspect the gage periodically for wear or damage that could affect dimensional accuracy.