Starrett 54265 O1 Tool Steel Flat Stock 1/16x3x36 in

Product Description

The STARRETT 54265 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die work, and precision machining applications. Manufactured to AISI Type O1 specification, this flat stock measures 1/16 inch thick, 3 inches wide, and 36 inches long, with a weight of 1.91 pounds. Thickness and squareness tolerances are held to plus or minus 0.001 inches, making it suitable for applications where dimensional accuracy is critical before heat treatment. Machinists, tool and die makers, and industrial maintenance technicians work with this material to fabricate punches, dies, gauges, and cutting tools.

O1 tool steel flat stock in this size is commonly used in job shops, toolrooms, and maintenance facilities for prototype and production toolmaking. The 3-inch width and 36-inch length provide usable stock for a range of medium-sized tooling blanks. This bar is supplied in the annealed condition, ready for machining and subsequent oil-quench hardening to achieve working hardness. It is appropriate for both one-off fabrication and short-run production work where tight tolerances on raw stock are required before machining begins.

Key Features

• AISI Type O1 oil-hardening tool steel — consistent alloy for predictable heat-treat response
• Thickness and squareness tolerance of plus or minus 0.001 inches for precision stock removal
• Width tolerance of 0.000 to minus 0.005 inches — stock runs at or slightly under nominal width
• Length tolerance of plus 0.015 inches — full nominal length guaranteed
• Edge squareness held to 0.003 inches per inch across all edges
• Supplied in annealed condition, ready for machining prior to oil quench hardening

Compatibility

Designed as a general-purpose O1 oil-hardening tool steel flat bar suitable for toolroom, die, 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 metalworking equipment. All heat treatment operations, including oil quench hardening and tempering, should follow recognized metallurgical procedures for AISI O1 tool steel. Eye protection, gloves, and proper chip and coolant controls are required during machining. Consult applicable shop safety standards before cutting or heat treating this material.