Spi 29-877-8 Class Zz Plus Plug Gage 0.877 in

Product Description

The SPI 29-877-8 is a Class ZZ Plus plug gage used to verify that a bored, drilled, or reamed hole meets a specified diameter tolerance. It measures a nominal diameter of 0.877 inches with a tolerance of 0.0002 inches, making it suitable for go/no-go inspection work where dimensional accuracy is critical. Constructed from steel, this gage is a standard tool in machine shops, manufacturing facilities, and quality-control environments where hole-size verification is part of the production or inspection process.

This plug gage is used in precision inspection applications requiring confirmation that inside diameters conform to tight dimensional specifications. It is appropriate for use on production lines, in tool rooms, or during incoming and outgoing inspection of machined components. Machinists, quality technicians, and tooling professionals typically deploy this type of gage as part of a go/no-go gauging system.

Key Features

• Class ZZ Plus tolerance classification for hole diameter verification
• Nominal measurement diameter of 0.877 inches
• Tolerance of 0.0002 inches for precise dimensional inspection
• Steel construction for durability in shop environments
• Single-piece package quantity for individual or replacement use

Compatibility

Designed as an OEM-style replacement or direct-use plug gage for go/no-go inspection setups requiring a 0.877-inch nominal bore diameter check conforming to Class ZZ Plus standards.

Installation Notes

Plug gages should be handled by qualified inspection or machining personnel familiar with dimensional gauging procedures. Clean the gage and workpiece bore before use to prevent debris from affecting measurement accuracy. Store the gage in a protective case away from other tooling to prevent surface damage. Do not force the gage into a bore; apply only light, consistent hand pressure during inspection.