Starrett 54466 O1 Tool Steel Flat Stock 5/8x2x36 Inch

Product Description

The STARRETT 54466 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die making, and precision machining applications. Manufactured to AISI Type O1 material specification, this flat stock measures 5/8 inch thick, 2 inches wide, and 36 inches long, with a weight of 12.75 pounds. Thickness tolerance is held to plus or minus 0.001 inches, making it suitable for applications where dimensional consistency is critical before and after heat treatment. Machinists, tool and die makers, and fabricators work with this stock to produce punches, dies, gauges, and other tooling components.

O1 tool steel flat stock is a standard material in job shops, tool rooms, and maintenance departments requiring a versatile, oil-hardening steel that machines cleanly in the annealed condition and responds predictably to heat treatment. This bar is supplied in the annealed state, ready for machining to final dimensions before hardening and tempering. At 36 inches in length, it provides enough stock for multiple smaller tooling blanks depending on the finished part size. The 2-inch width and 5/8-inch thickness cover a common range of die and punch blank requirements.

Key Features

• AISI Type O1 oil-hardening tool steel for predictable heat treat response
• Thickness tolerance of plus or minus 0.001 inches for consistent stock sizing
• Width tolerance of 0.000 to minus 0.005 inches
• Length tolerance of plus 0.015 inches
• Edge squareness held to 0.003 inches per inch on all edges
• Supplied in annealed condition, ready for machining prior to hardening

Compatibility

Designed as a standard O1 oil-hardening tool steel flat bar suitable for general toolmaking, die making, and precision machining applications requiring AISI Type O1 material specification.

Installation Notes

Cutting, grinding, and machining of tool steel flat stock should be performed by qualified machinists or tool and die makers using appropriate tooling for hardened or annealed steel as applicable. All heat treatment operations including hardening and tempering should follow established metallurgical procedures for AISI O1 tool steel and be performed by qualified personnel. Use proper personal protective equipment when cutting or grinding. Final part dimensions should be confirmed with calibrated measuring instruments before committing to heat treatment.