Starrett 54056 O1 Tool Steel Flat Stock 3/16x8x18 in

Product Description

The STARRETT 54056 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die making, and precision machining applications. Manufactured to AISI Type O1 specification, this flat stock measures 3/16 inches thick, 8 inches wide, and 18 inches long and weighs 7.65 pounds. Thickness tolerance is held to plus or minus 0.001 inches, and squareness is maintained at 0.003 inches per inch on all edges. It is supplied in an annealed condition, ready for machining, grinding, and final heat treatment. Toolmakers, machinists, and die makers work with this material to produce punches, dies, gauges, and custom tooling.

O1 tool steel flat stock is a standard material in job shops, tool rooms, and maintenance departments where precision ground stock is required before hardening. This bar is sized for applications requiring a wide, thin profile and is suited to fabricating blanks for jigs, fixtures, blades, and wear plates. The 18-inch length provides a practical working blank for most bench-scale toolmaking tasks. Its oil-quenching characteristic makes it well suited for shops equipped for conventional oil-hardening heat treatment.

Key Features

• AISI Type O1 oil-hardening tool steel material specification
• Thickness tolerance of plus or minus 0.001 inches for precise stock removal planning
• Width tolerance of 0.000 to 0.005 inches under nominal
• 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 AISI O1 oil-hardening tool steel flat stock suitable for general toolmaking, die work, and precision machining applications requiring pre-hardened or anneal-and-harden workflows.

Installation Notes

Machining and grinding of O1 tool steel should be performed in the annealed condition prior to heat treatment. Heat treatment, including austenitizing and oil quenching, should be carried out by qualified personnel following established metallurgical procedures. Appropriate personal protective equipment is required when cutting, grinding, or heat treating tool steel. Follow shop safety protocols and applicable OSHA guidelines when handling stock of this size and weight.