Precision Brand 57508 Key Stock 5/8 in Square 12 in Stainless

Product Description

The PRECISION BRAND 57508 is a square key stock bar used to transmit torque between a shaft and a mating component such as a gear, pulley, or sprocket. Measuring 5/8 inch wide by 5/8 inch high by 12 inches long, this piece is cut to a standard square profile that fits standard keyways in power-transmission assemblies. Constructed from stainless steel with a plain finish, it offers solid corrosion resistance in environments where carbon steel stock would degrade. Machinists, millwrights, and maintenance technicians use key stock like this to build or restore mechanical drive assemblies across industrial, HVAC, and pump applications.

This key stock is suited for use in both light and moderate-duty power-transmission setups where a corrosion-resistant material is required. Common installation scenarios include pump shafts, fan drive assemblies, conveyor components, and general industrial machinery where shaft-to-hub locking is needed. The 12-inch length allows the technician to cut the piece to the exact finished key length required for the application. Sold as a single piece.

Key Features

• Square profile: 5/8 inch wide by 5/8 inch high for standard keyway fitment
• 12-inch length provides material for cutting to finished key length on the job
• Stainless steel construction for corrosion resistance in harsh or wet environments
• Plain finish — ready for machining, filing, or fitting as needed
• Conforms to standard UNSPSC classification 31163208 for mechanical key stock

Compatibility

Designed as a standard-profile replacement or fabrication blank for 5/8-inch square keyway shafts and hubs in general power-transmission assemblies.

Installation Notes

Key stock installation is typically performed by a machinist or millwright. De-energize and lock out the drive equipment before removing or installing any shaft components. The stock should be cut, filed, and fitted to achieve a snug slip fit in the keyway — do not force-fit with a hammer unless the application specifically requires a driven key. Follow applicable machinery safety standards when working on power-transmission equipment.