Starrett 54423 O1 Tool Steel Flat Stock 3/8x8x36 in

Product Description

The STARRETT 54423 is an O1 oil-hardening tool steel flat stock bar measuring 3/8 inch thick, 8 inches wide, and 36 inches long. Manufactured to AISI Type O1 specifications, this flat stock is a ground and precision-tolerance material used in toolmaking, die making, jig construction, and general machine shop fabrication. Thickness and squareness tolerances are held to plus or minus 0.001 inches, and edge squareness is controlled to 0.003 inches per inch, making this stock suitable for applications where dimensional accuracy is critical. It weighs approximately 30.59 pounds per piece.

O1 tool steel flat stock is a standard material in fabrication shops, toolrooms, and production machine shops. It is used to manufacture punches, dies, blades, gauges, and custom tooling components. This bar stock ships in annealed condition, allowing it to be machined, ground, and then heat-treated by oil quenching to achieve desired hardness. Typical users include tool and die makers, machinists, and maintenance engineers working in industrial and manufacturing environments.

Key Features

• AISI Type O1 oil-hardening tool steel for consistent heat-treat response
• Thickness tolerance: plus or minus 0.001 inches for tight dimensional control
• Length tolerance: plus 0.015 inches, minus 0 inches
• Width tolerance: minus 0 to minus 0.005 inches
• Edge squareness held to 0.003 inches per inch on all edges
• Supplied in annealed condition, ready for machining and subsequent heat treatment

Compatibility

Designed as a general-purpose O1 tool steel flat stock for use in toolroom, die shop, and fabrication applications where oil-hardening steel stock is specified.

Installation Notes

Machining and grinding operations should be performed in the annealed condition before heat treatment. Oil quenching is required to harden O1 tool steel — follow established heat treatment procedures and applicable shop safety protocols for handling heated steel and quench media. Secure workpiece properly during machining to maintain tolerances. Personal protective equipment appropriate for machine shop operations should be worn at all times.