Drill Rod Tool Steels 57904 O1 Tool Steel Flat Stock

Product Description

The DRILL ROD TOOL STEELS 57904 is an O1 oil-hardening tool steel flat stock bar measuring 7/32 inches thick, 1 inch wide, and 36 inches long. Manufactured to AISI Type O1 specifications, this flat stock is held to tight dimensional tolerances, including a thickness tolerance of plus or minus 0.001 inches and a width tolerance of plus 0.005 to minus 0.000 inches. O1 tool steel is a general-purpose oil-hardening grade widely used in toolmaking, die making, and precision machining applications. Machinists, tool-and-die makers, and metalworking shops use this material for blanks, punches, dies, and cutting tools requiring good wear resistance and dimensional stability after heat treatment.

This flat stock is suited for both small shop and production environments where precise, pre-sized tool steel stock reduces setup time. The 36-inch length and standard 1-inch width make it a practical choice for fabricating jigs, fixtures, hand tools, and custom cutting tools. The oil-hardening characteristic of O1 means parts can be through-hardened with minimal distortion compared to water-hardening grades, making it preferable for precision components that must retain close tolerances post-quench.

Key Features

• AISI Type O1 oil-hardening tool steel - suitable for heat treatment with minimal distortion
• Thickness: 7/32 inches with a tolerance of plus or minus 0.001 inches
• Width: 1 inch with a tolerance of plus 0.005 to minus 0.000 inches
• Length: 36 inches with a length tolerance of plus 0.5 inches
• Squareness: edge 0.003 inches per inch of thickness, end 0.004 inches per inch of thickness
• Ready-to-use flat bar stock - no additional sizing required for most toolmaking blanks

Compatibility

Designed as a standard O1 oil-hardening tool steel flat bar for general toolmaking, die making, 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. Wear proper PPE including eye protection and gloves when cutting or grinding. When heat treating, follow established AISI O1 oil-quench procedures and consult material safety data for applicable shop ventilation requirements. Allow material to reach ambient temperature before measuring final dimensions after any thermal operation.