Starrett 54360 O1 Tool Steel Flat Stock 7/32x4x36 in

Product Description

The STARRETT 54360 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die work, punches, and precision machined components. Manufactured from AISI Type O1 tool steel, this flat bar measures 7/32 inches thick, 4 inches wide, and 36 inches long, with a finished weight of 8.93 pounds. O1 is a general-purpose oil-hardening tool steel known for good machinability in the annealed state and predictable response to heat treatment. Tolerances are held to plus or minus 0.001 inches on thickness, making this stock suitable for applications where dimensional consistency matters before and after hardening operations.

This flat stock is used in machine shops, tool and die shops, and fabrication environments. Typical applications include making blanks for cutting tools, jigs, fixtures, mold components, and gauges. The 36-inch length allows multiple blanks to be cut from a single piece. It is handled by machinists, tool and die makers, and metalworking tradespeople who require a reliable annealed starting material for precision work. The 4-inch width accommodates wider tooling profiles without the need to join multiple pieces.

Key Features

• AISI Type O1 oil-hardening tool steel for predictable heat treat response
• Thickness held to plus or minus 0.001 inches for tight dimensional control
• Width tolerance of 0.000 to 0.005 inches under nominal
• Length tolerance of plus 0.015 inches, minus 0 inches
• Edge squareness: 0.003 inches per inch on all edges
• Annealed condition allows machining prior to hardening

Compatibility

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

Installation Notes

Cutting and machining of tool steel flat stock should be performed with appropriate metalworking equipment by qualified machinists or tool and die makers. Secure the workpiece properly before sawing or milling to prevent movement and ensure dimensional accuracy. Heat treatment, including hardening and tempering, should follow established metallurgical procedures for AISI O1 tool steel and must be performed in suitable equipment by qualified personnel. Always wear appropriate PPE when cutting, grinding, or heat treating tool steel.