Drill Rod Tool Steels 57943 O1 Tool Steel Flat Stock

Product Description

The DRILL ROD TOOL STEELS 57943 is an O1 oil-hardening tool steel flat stock bar measuring 7/16 inches thick by 7/16 inches wide by 36 inches long. Conforming to AISI Type O1 specifications, this flat stock is manufactured from tool steel and is intended for applications requiring a stock that can be machined, ground, and then oil-quenched to achieve working hardness. Machinists, tool-and-die makers, and metalworking shops use this material to fabricate punches, dies, gauges, and cutting tools. The piece weighs approximately 1.98 pounds and ships as a single bar.

This flat stock is suited for general tool-and-die work in job shops and production machining environments. Its square cross-section profile and close tolerances make it a practical starting point for custom tooling where dimensional control is critical before and after heat treatment. The 36-inch length provides enough stock to yield multiple shorter tooling blanks from a single piece, reducing setup time and material waste on the shop floor.

Key Features

• AISI Type O1 oil-hardening tool steel for controlled heat treatment and good wear resistance in finished tools
• Square cross-section: 7/16 inches thick by 7/16 inches wide, suitable for punch and die blanks
• 36-inch length with a length tolerance of plus 0.5 inches, allowing full usable stock
• Thickness tolerance held to plus or minus 0.001 inches for consistent grinding stock allowance
• Width tolerance of plus 0.005 inches to minus 0.000 inches
• Squareness: edge 0.003 inches, end 0.004 inches per inch of thickness

Compatibility

Designed as a standard AISI Type O1 oil-hardening tool steel flat stock suitable for general toolmaking, die-making, and precision machining applications where oil-quench heat treatment will be performed.

Installation Notes

Cutting and grinding of tool steel flat stock should be performed by a qualified machinist using appropriate metalworking equipment. Follow established heat treatment procedures for O1 oil-hardening steel, including proper preheat, hardening temperature, and quench media guidelines from the material supplier or a certified metallurgical reference. Wear appropriate personal protective equipment when cutting, grinding, or heat treating. Do not attempt heat treatment without verified equipment and process controls.