Starrett 54424 O1 Tool Steel Flat Stock 3/8x10x36 in

Product Description

The STARRETT 54424 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die making, and precision machining applications. Manufactured to AISI Type O1 specifications, this flat stock measures 3/8 inch thick, 10 inches wide, and 36 inches long. It holds a thickness tolerance of plus or minus 0.001 inches and a length tolerance of plus 0.015 inches. The material is tool steel, offering the hardness and wear resistance required for punches, dies, gauges, and similar precision tooling components. Machinists, tool and die makers, and skilled tradespeople work with this stock in both shop and production environments.

O1 oil-hardening tool steel flat stock is suited for fabricating cutting tools, jigs, fixtures, and other precision tooling where dimensional accuracy and consistent hardness after heat treatment are required. This piece is sized for applications demanding wide, flat blanks with close tolerances, making it appropriate for medium to large die plates, wear strips, and custom tooling components in job shop and production machine shop settings.

Key Features

• AISI Type O1 oil-hardening tool steel construction for consistent heat-treat response
• Thickness held to plus or minus 0.001 inches for precision tooling applications
• Width tolerance of 0.000 to minus 0.015 inches for predictable fit-up
• Length tolerance of plus 0.015 inches allows for final facing cuts
• Edge squareness held to 0.003 inches per inch across all edges
• Full 36-inch length provides flexibility for multiple blanks from a single piece

Compatibility

Designed as a standard O1 oil-hardening tool steel flat stock blank suitable for use in toolmaking, die making, and general precision machining applications requiring AISI Type O1 material.

Installation Notes

Cutting and machining of tool steel flat stock should be performed by qualified machinists or tool and die makers using appropriate metalworking equipment. Follow established shop safety practices including eye protection, machine guarding, and proper workholding when sawing, milling, or grinding this material. Heat treatment should be performed according to the applicable procedures for AISI Type O1 tool steel and carried out by qualified personnel. Allow material to reach ambient temperature before final inspection of dimensions.