48H545 - 1/2 Inch Square Carbon Steel Keystock, 12 Inch Length

Precision Carbon Steel Key Stock for Industrial Repair

The Walter Key Steel (SKU: 48H545) is a premium-grade machine repair component designed for the rigorous demands of industrial maintenance and operations (MRO). Manufactured from high-quality cold-drawn carbon steel, this square keystock is engineered to provide the shear strength necessary to transmit torque effectively between driving shafts and driven components such as gears, pulleys, sprockets, and couplings. The 1/2-inch by 1/2-inch square profile is maintained within strict tolerances, typically slightly undersized, to ensure a consistent and interference-free fit into standard keyways.

In mechanical power transmission, the integrity of the key is critical to preventing slippage and equipment failure. This 12-inch length of stock allows maintenance technicians to cut custom-sized keys on-site, reducing downtime and the need to stock multiple pre-cut sizes. The carbon steel material offers a balanced combination of hardness and ductility, preventing the key from shearing under normal load conditions while avoiding the brittleness associated with harder alloys. It is an indispensable item for machine shops, HVAC repair, and heavy equipment maintenance.

This product is supplied with a light oil coating to prevent corrosion during storage and shipping. It is compatible with a wide range of standard imperial keyways found in electric motors, gear reducers, and industrial machinery. Whether you are rebuilding a conveyor drive or replacing a sheared key in a pump assembly, the Walter 48H545 provides the reliability and dimensional accuracy required for professional mechanical repairs.