Starrett 54288 O1 Tool Steel Flat Stock 3/32x5x36 in

Product Description

The STARRETT 54288 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die work, jig fabrication, and precision machining applications. Manufactured to AISI Type O1 specification, this flat stock measures 3/32 inch thick, 5 inches wide, and 36 inches long, with a finished weight of 4.74 pounds. Thickness tolerance is held to +/- 0.001 inches, making it suitable for close-tolerance toolroom work where dimensional accuracy is critical before hardening. Machinists, tool and die makers, and metalworking shops use this material as a reliable pre-hardened or anneal-state stock for fabricating custom tooling.

O1 tool steel flat stock is a standard choice for toolrooms producing punches, dies, blades, gauges, and fixtures. The 3/32-inch thickness makes this particular bar appropriate for thin-section tooling components or spacers where precise flatness and edge squareness are required. Squareness across all edges is held to 0.003 inches per inch. This stock ships in a single 36-inch length and is suitable for bench or machine work prior to oil-quench hardening and tempering operations. Metalworking professionals performing in-house tool fabrication will find this a direct-use stock requiring minimal surface preparation.

Key Features

• AISI Type O1 oil-hardening tool steel material specification
• Thickness tolerance of +/- 0.001 inches for close-tolerance toolroom work
• Width tolerance of 0.000 to -0.005 inches
• Length tolerance of +0.015 inches
• Edge squareness held to 0.003 inches per inch on all edges
• Ready for oil-quench hardening and tempering as-cut

Compatibility

Designed as a standard AISI O1 oil-hardening tool steel flat bar suitable for general toolroom and die shop applications requiring pre-machined flat stock in a 3/32 x 5 x 36 inch form factor.

Installation Notes

Machining and cutting of tool steel flat stock should be performed by qualified machinists or tool and die makers using appropriate metalworking equipment. Always follow proper lockout and machine guarding procedures before setup. Oil-quench hardening and tempering operations involve elevated temperatures and flammable quench media and should be performed by experienced personnel following applicable shop safety protocols. Do not attempt to flame-cut or weld O1 tool steel without consulting the material specification for preheat and post-heat requirements.