Starrett 54340 O1 Tool Steel Flat Stock 3/16x1x36 in

Product Description

The STARRETT 54340 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die making, jig fabrication, and precision machining applications. Manufactured to AISI Type O1 specification, this flat stock measures 3/16 inch thick, 1 inch wide, and 36 inches long, and ships in annealed condition ready for machining before heat treat. Thickness tolerance is held to plus or minus 0.001 inches, giving toolmakers a reliable starting dimension without additional surface grinding. At 1.91 pounds per bar, it is manageable for bench work and light machinery setups. This grade is widely used when a tough, wear-resistant tool steel with good machinability in the soft state is required.

O1 tool steel flat stock is a standard material in tool and die shops, machine shops, and maintenance departments. It is used to produce punches, dies, gauges, knives, lathe centers, and other precision tooling components that require a hard, wear-resistant surface after oil-quench heat treatment. The 36-inch length suits standard bench and surface grinder setups. Machinists, tool and die makers, and maintenance technicians working in industrial, commercial, and job-shop environments typically stock this material.

Key Features

• AISI Type O1 oil-hardening tool steel — suitable for punches, dies, gauges, and precision tooling
• Thickness tolerance of plus or minus 0.001 inches for consistent starting dimensions
• Width tolerance of 0.000 to minus 0.005 inches
• Length tolerance of plus 0.015 inches
• Edge squareness held to 0.003 inches per inch across all edges
• Annealed condition allows machining prior to oil-quench heat treatment

Compatibility

Designed as a standard AISI O1 oil-hardening tool steel flat bar suitable for general toolmaking and die-making applications requiring a 3/16 inch by 1 inch cross-section.

Installation Notes

Cutting, grinding, and machining of tool steel flat stock should be performed with appropriate metal-cutting equipment and personal protective equipment including eye protection and gloves. Heat treatment, including oil quenching and tempering, should be performed by qualified personnel following established metallurgical procedures for AISI O1 tool steel. Always allow material to reach ambient temperature before final inspection for dimension compliance.