Starrett 54990 Low Carbon Steel Flat Stock 24x3x0.5 in

Product Description

The STARRETT 54990 is a low carbon steel flat stock bar cut to 24 inches long, 3 inches wide, and 0.5 inches thick. Made from AISI Type C1018 steel, this material is well-suited for general fabrication, machining, and structural applications where close dimensional tolerances are required. Length tolerance is held to plus 0.625 inches. Width tolerance is plus 0.000 to 0.005 inches. Thickness and squareness tolerances are held to plus or minus 0.001 inches. The piece weighs approximately 10.2 pounds. Machinists, fabricators, and maintenance tradespeople stock this material for keyways, brackets, plates, shims, and general metalwork.

This flat stock is suited for job shop fabrication, MRO maintenance applications, and light structural work in both commercial and industrial settings. The C1018 specification indicates a mild, low carbon steel with good weldability and machinability. It is commonly used in HVAC equipment frames, electrical panel supports, plumbing hangers, and general mechanical assemblies where precise flat bar stock is needed. The controlled tolerances make it appropriate for applications requiring consistent fit without additional surface grinding.

Key Features

• AISI Type C1018 low carbon steel for reliable weldability and machinability
• Thickness and squareness held to plus or minus 0.001 inches for precise fitment
• Width tolerance of plus 0.000 to 0.005 inches for consistent cross-section
• Length tolerance of plus 0.625 inches allows for cut-to-fit flexibility
• 10.2 pound piece weight suitable for bench stock or direct installation use

Compatibility

Designed as a general-purpose low carbon steel flat bar suitable for fabrication, repair, and replacement applications across HVAC, plumbing, electrical, and industrial maintenance trades.

Installation Notes

Cutting, drilling, or welding should be performed by qualified tradespeople using appropriate personal protective equipment and ventilation. Follow applicable OSHA and local safety codes when cutting or welding steel stock. Deburr all cut edges before handling or installation. Secure workpiece properly before machining to maintain dimensional accuracy.