Starrett 54030 O1 Tool Steel Flat Stock 5/32x1x18 in

Product Description

The STARRETT 54030 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die making, and precision machining applications. Manufactured from AISI Type O1 tool steel, this flat stock measures 5/32 inches thick, 1 inch wide, and 18 inches long, with a weight of 0.8 pounds. The tight dimensional tolerances — plus or minus 0.001 inches on thickness — make this material well-suited for applications where ground stock accuracy is required before heat treatment. O1 tool steel is a general-purpose oil-hardening grade valued for its machinability in the annealed state and its ability to hold sharp edges and close tolerances after hardening.

This flat stock is used in machine shops, tool and die operations, and precision fabrication environments. Typical applications include punch and die components, jigs, fixtures, gauges, and small cutting tools. The 18-inch length and 1-inch width provide a workable blank for layout and machining before hardening. Tool and die makers, machinists, and metalworking professionals are the primary users of this material. It is supplied in the annealed condition, ready for machining prior to oil-quench heat treatment.

Key Features

• AISI Type O1 oil-hardening tool steel for reliable machinability in the annealed state
• Thickness tolerance of plus or minus 0.001 inches for precise pre-hardened dimensions
• Width tolerance of 0.000 to 0.005 inches under nominal
• Length tolerance of plus 0.250 inches from nominal 18 inches
• Edge squareness held to 0.003 inches per inch on all edges
• Weighs 0.8 pounds — manageable single-piece blank for bench work

Compatibility

Designed as a standard O1 oil-hardening tool steel flat stock blank suitable for general toolmaking, die making, and precision machining applications requiring oil-quench heat treatment.

Installation Notes

Machining of O1 tool steel flat stock should be performed in the annealed state prior to heat treatment. Oil-quench hardening requires proper furnace equipment and quench media — this process should be performed by a qualified heat treater or tool and die professional. Follow applicable shop safety practices for handling tool steel during cutting, grinding, and heat treatment operations. Always allow the workpiece to reach ambient temperature before final inspection of tolerances.