Starrett 54286 O1 Tool Steel Flat Stock 3x36 Inch

Product Description

The STARRETT 54286 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 specifications, this flat bar measures 3/32 inches thick, 3 inches wide, and 36 inches long. Thickness and squareness tolerances are held to plus or minus 0.001 inches, making this stock suitable for applications requiring close dimensional control before heat treatment. At 2.88 pounds per piece, it is a practical single-piece workable length for most shop setups. Machinists, toolmakers, and die makers work with this material regularly when producing punches, dies, gauges, and custom tooling.

O1 tool steel flat stock is used in both job shops and production toolrooms where oil-hardening steel is specified for its good machinability in the annealed state and stable dimensional change during hardening. This bar is suited to fabricating flat tools, wear plates, stripper plates, and similar components. It ships in the annealed condition and is intended for machining prior to oil quench heat treatment. UNSPSC code 31231200 identifies this as a raw metal bar stock commodity used across general manufacturing and maintenance trades.

Key Features

• AISI Type O1 oil-hardening tool steel — machinable in annealed state, oil quenched for final hardness
• Thickness held to plus or minus 0.001 inches for consistent stock removal planning
• Width tolerance of 0.000 to minus 0.005 inches ensures the bar fits into slots and fixtures without interference
• Length tolerance of plus 0.015 inches provides slight oversize for facing or squaring operations
• Squareness held to 0.003 inches per inch on all edges — suitable for reference surfaces and precision layouts
• Single-piece 36-inch length minimizes handling and allows multiple blanks to be cut from one bar

Compatibility

Designed as a standard AISI Type O1 oil-hardening tool steel flat bar suitable for general toolroom, die shop, and precision machining applications requiring annealed tool steel stock in 3/32 inch by 3 inch cross-section.

Installation Notes

Tool steel flat stock is cut, ground, and machined by toolmakers and machinists using conventional metalworking equipment. Always follow shop-specific heat treatment procedures and use appropriate personal protective equipment when cutting or grinding hardened or annealed tool steel. Heat treatment to final hardness should be performed by qualified personnel following AISI O1 quench and temper guidelines. Deburr all edges after cutting to prevent handling injuries and to ensure accurate layout and fit-up.