Starrett 54368 O1 Tool Steel Flat Stock 1/4x2x36 in

Product Description

The STARRETT 54368 is an O1 oil-hardening tool steel flat stock bar measuring 0.25 inches thick, 2 inches wide, and 36 inches long. O1 is an AISI-grade, oil-quench tool steel widely used in toolmaking, die work, and precision machining applications where consistent hardness and tight dimensional tolerances are required. This flat stock ships in its annealed (soft) state, ready for machining and subsequent heat treating. Thickness and squareness tolerances are held to plus or minus 0.001 inches, making it suitable for applications that demand close-tolerance blank preparation before hardening. The bar weighs approximately 5.1 pounds.

This flat stock is used in tool and die shops, machine shops, and maintenance repair operations for fabricating punches, dies, gauges, jigs, fixtures, and cutting tools. It is a standard choice wherever a tough, wear-resistant tool steel is needed in flat bar form. The annealed condition allows straightforward machining with conventional tooling before the oil-hardening heat treat cycle.

Key Features

• AISI Type O1 oil-hardening tool steel for consistent hardenability
• Thickness tolerance: plus or minus 0.001 inches for precise blank sizing
• Width tolerance: 0.0000 to 0.005 inches undersize
• Length tolerance: plus 0.015 inches, minus 0 inches
• Squareness: edge all sides within 0.003 inches per inch
• Annealed condition — machinable with standard tooling prior to heat treating

Compatibility

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

Installation Notes

Machining and shaping should be completed while the bar is in its annealed state before any heat treatment is performed. Oil-hardening tool steel requires a controlled heat treat and quench process typically performed by a qualified heat treat facility or experienced toolmaker following established metallurgical procedures. Secure workpieces properly during cutting and grinding operations and use appropriate personal protective equipment. Consult the material specification and applicable shop safety standards before processing.