Starrett 54331 O1 Tool Steel Flat Stock 5/32x2-1/2x36 in

Product Description

The STARRETT 54331 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die making, jig fabrication, and precision machining applications. Manufactured to AISI Type O1 specifications, this flat stock measures 5/32 inches thick, 2-1/2 inches wide, and 36 inches long, with a weight of 3.99 pounds. Thickness tolerance is held to plus or minus 0.001 inches, and squareness is maintained at a maximum of 0.003 inches per inch on all edges. These tight tolerances make it suitable for applications where dimensional accuracy is critical before hardening and grinding operations begin.

O1 tool steel flat stock is commonly used by tool and die makers, machinists, and metalworking professionals in both production and maintenance shop environments. This bar stock is appropriate for fabricating punches, dies, gauges, cutting tools, and other precision tooling components that require a material capable of achieving high hardness through an oil-quench heat treatment process. The 36-inch length provides a practical starting size for most bench and machine shop work without requiring additional cutting from larger stock.

Key Features

• AISI Type O1 oil-hardening tool steel material specification
• Thickness tolerance of plus or minus 0.001 inches for consistent stock removal during grinding
• Length tolerance of plus 0.015 inches, 0 minus
• Width tolerance of 0.000 to minus 0.005 inches
• Squareness maintained at 0.003 inches per inch on all edges
• Ready for machining in the annealed condition prior to heat treatment

Compatibility

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

Installation Notes

Cutting, grinding, and machining of tool steel flat stock should be performed by qualified machinists or tool and die makers using appropriate cutting fluids and personal protective equipment. Material is typically supplied in the annealed condition and requires professional heat treatment, including oil quenching and tempering, to achieve working hardness. Always verify final dimensions after stress-relief or heat-treat operations, as distortion can occur. Follow applicable shop safety standards and equipment manufacturer guidelines when cutting or grinding tool steel.