Starrett 59143 O1 Tool Steel Flat Stock 1/32 X 3/4 X 36 in

Product Description

The STARRETT 59143 is an O1 oil-hardening tool steel flat stock bar measuring 1/32 inch thick, 3/4 inch wide, and 36 inches long. Manufactured to AISI Type O1 specifications, this flat stock is intended for tool and die makers, machinists, and metalworking professionals who require a precision-ground, oil-hardening steel in ready-to-use bar form. The tight thickness tolerance of plus or minus 0.001 inches makes it suitable for applications where dimensional consistency before and after hardening is critical. It ships at 0.24 pounds, making it easy to handle and cut to final length on the bench.

O1 tool steel flat stock is commonly used in toolroom environments for fabricating punches, dies, cutting tools, gauges, and small machine components. The 36-inch length allows a single piece to be cut down into multiple working blanks. This material is appropriate for both prototype tooling and production-grade tool fabrication in job shops, maintenance departments, and precision machining facilities. It is suitable for applications that do not require air-hardening or high-speed steel properties.

Key Features

• AISI Type O1 oil-hardening tool steel for consistent hardenability in oil quench
• Thickness tolerance of plus or minus 0.001 inches for precise pre-hardened dimensioning
• Width tolerance of 0.000 to minus 0.005 inches ensures repeatable fit in close-clearance applications
• Length tolerance of plus 0.015 inches provides full usable length on every bar
• Edge squareness held to 0.003 inches per inch for reliable reference surfaces
• Single-piece packaging suitable for toolroom pull-as-needed use

Compatibility

Designed as a standard AISI O1 oil-hardening tool steel flat bar suitable for general toolroom fabrication where O1 material specification is required.

Installation Notes

Cutting, grinding, and machining should be performed by qualified machinists or toolmakers using appropriate metalworking equipment. Always wear appropriate PPE including eye protection and gloves when cutting or grinding tool steel. Heat treatment and oil quenching must follow established metallurgical procedures for AISI O1 steel and should be performed in a controlled environment. Allow the material to reach ambient temperature before taking final measurements after any thermal process.