Starrett 54038 O1 Tool Steel Flat Stock 5/32x4x18 in

Product Description

The STARRETT 54038 is an O1 oil-hardening tool steel flat stock bar, precision-ground to close dimensional tolerances for toolmaking, die work, jig fabrication, and general machining applications. Conforming to AISI Type O1 material specification, it measures 5/32 inches thick, 4 inches wide, and 18 inches long, with a weight of 3.19 pounds. Thickness tolerance is held to plus or minus 0.001 inches, making this stock well-suited for applications where dimensional accuracy before heat treatment is critical. It is supplied in the annealed condition, ready for machining prior to oil-hardening.

O1 tool steel flat stock in this size range is commonly used by tool and die makers, machinists, and maintenance shops for producing punches, dies, gauges, fixtures, and small tooling components. The 4-inch width and 18-inch length provide a practical blank size for layout and cutting to final form. The bar ships as a single piece and is appropriate for both production shops and job-shop environments requiring tight-tolerance raw material stock.

Key Features

• AISI Type O1 oil-hardening tool steel material specification
• Thickness tolerance of plus or minus 0.001 inches for close-tolerance blanks
• Width tolerance of 0.000 to minus 0.005 inches
• Length tolerance of plus 0.250 inches, minus 0 inches
• Squareness held to 0.003 inches per inch on all edges
• Supplied annealed for machinability prior to heat treatment

Compatibility

Designed as a standard O1 oil-hardening tool steel flat stock blank suitable for toolmaking, die making, and precision machining applications requiring AISI Type O1 material.

Installation Notes

Machining and heat treatment of tool steel should be performed by qualified machinists or tool and die makers familiar with O1 oil-hardening steel procedures. Always allow the bar to reach ambient temperature before precision layout work. When hardening, follow the appropriate austenitizing and oil-quench procedures for AISI O1 tool steel per the material manufacturer guidelines. Wear appropriate PPE when cutting, grinding, or heat treating tool steel stock.