Starrett 54434 O1 Tool Steel Flat Stock 7/16x3x36

Product Description

The STARRETT 54434 is an O1 oil-hardening tool steel flat stock bar sized at 7/16 inch thick, 3 inches wide, and 36 inches long. Manufactured to AISI Type O1 specification, this flat stock is a general-purpose tool steel known for its good machinability in the annealed state and its ability to achieve high hardness after oil quenching. It is used by tool and die makers, machinists, and metalworking shops as raw material for punches, dies, gauges, jigs, and cutting tools. Thickness and squareness tolerances are held tightly, making it suitable for precision tooling applications. The piece weighs approximately 13.39 pounds.

This flat stock is suited for machine shops, tool rooms, and fabrication environments where O1 tool steel is the specified material. Common applications include blanking dies, forming tools, drill jigs, and fixture components that require subsequent heat treatment. At 36 inches long, the bar provides enough length for multiple tooling blanks from a single piece. It ships as a single bar and is intended for professional metalworking use where material certifications and dimensional consistency are critical to downstream machining operations.

Key Features

• AISI Type O1 oil-hardening tool steel for consistent heat treat response
• Thickness tolerance of plus or minus 0.001 inches for precision fitment
• Length tolerance of plus 0.015 inches, ensuring no undersize material
• Width tolerance of 0.000 to minus 0.005 inches
• Squareness held to 0.003 inches per inch on all edges
• 36-inch length provides multiple blanking opportunities per bar

Compatibility

Designed as a raw material flat stock bar for use in any application requiring AISI Type O1 oil-hardening tool steel in a 7/16 inch by 3 inch cross-section profile.

Installation Notes

Cutting, drilling, and machining of tool steel flat stock should be performed with equipment rated for hardened or semi-hardened ferrous materials; the bar is supplied in the annealed condition and can be machined before heat treatment. Appropriate personal protective equipment including eye protection and gloves is required when cutting or grinding. Heat treatment to final hardness should be performed by a qualified heat treater following established O1 quench and temper procedures. Secure the workpiece properly during all machining operations to prevent movement and dimensional error.