Starrett 54406 O1 Tool Steel Flat Stock 3/8 X 3/8 X 36 in

Product Description

The STARRETT 54406 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die work, and precision machining applications. Manufactured to AISI Type O1 specifications, this flat stock measures 3/8 inches thick by 3/8 inches wide by 36 inches long and ships in an annealed, machinable condition ready for layout, cutting, and rough shaping before heat treatment. Thickness tolerance is held to plus or minus 0.001 inches, providing the dimensional consistency required for precision tooling blanks. At 1.44 pounds per piece, it is a manageable bar length for bench and mill work. Licensed machinists, tool and die makers, and maintenance machinists are the primary users of this material.

O1 tool steel flat stock is suited for low-to-medium production tooling where oil-quench hardening will follow rough machining. Common applications include punches, dies, gauges, jigs, fixtures, and cutting tools. The 36-inch bar length allows multiple blanks to be cut from a single piece, reducing material waste. This stock is appropriate for both job shop and in-house maintenance toolroom use in industrial, manufacturing, and metalworking environments.

Key Features

• AISI Type O1 oil-hardening tool steel construction for reliable heat-treat response
• Thickness and squareness tolerances held to plus or minus 0.001 inches for precision fitment
• Width tolerance of 0.000 to 0.005 inches with length tolerance of plus 0.015 inches
• Edge squareness held to 0.003 inches per inch across all edges
• 36-inch length provides flexibility to cut multiple blanks from one bar
• Ships in annealed condition, ready for machining prior to hardening

Compatibility

Designed as a standard AISI Type O1 oil-hardening tool steel flat stock suitable for general toolroom fabrication of punches, dies, gauges, and fixtures where oil-quench heat treatment will be applied.

Installation Notes

Cutting and machining should be performed while the stock is in its annealed state prior to heat treatment. Use appropriate personal protective equipment and machine guarding when sawing or milling tool steel bar stock. Heat treatment, including hardening and tempering, should be performed by qualified personnel following established metallurgical procedures for AISI O1 tool steel. Allow material to reach ambient temperature before performing precision layout or final grinding operations.