Starrett 54169 O1 Tool Steel Flat Stock 9/16x1-1/4x18 in

Product Description

The STARRETT 54169 is an O1 oil-hardening tool steel flat stock bar intended for use in toolmaking, die making, jig fabrication, and precision machining applications. Manufactured to AISI Type O1 specification, this flat stock measures 9/16 inches thick, 1-1/4 inches wide, and 18 inches long, and weighs 3.59 pounds. Thickness tolerance is held to +/- 0.001 inches, reflecting the close dimensional control expected in tool steel stock. Machinists and tool and die makers select O1 for its excellent machinability in the annealed state and its predictable response to oil-hardening heat treatment.

This flat stock is suited for fabricating punches, dies, gauges, bushings, and general toolroom components where tight dimensional tolerances and consistent material quality are required. It is typically purchased by tool and die shops, machine shops, and maintenance departments that need a reliable, readily machinable tool steel in cut-to-use lengths. The 18-inch length makes it practical for a wide range of bench and machine work without requiring additional cutting before use.

Key Features

• AISI Type O1 oil-hardening tool steel for predictable heat treatment response
• Thickness held to +/- 0.001 inches for close-tolerance toolroom work
• Width tolerance of 0.0000 to 0.0050 inches (minus zero, plus 0.005 inches)
• Length tolerance of +0.250 inches, minus zero
• Edge squareness: 0.003 inches per inch on all edges
• Supplied in annealed condition, ready for machining prior to hardening

Compatibility

Designed as a standard AISI O1 oil-hardening tool steel flat stock suitable for toolmaking, die making, and precision fixture fabrication in machine shop and toolroom environments.

Installation Notes

O1 tool steel flat stock is worked by machinists and tool and die makers using conventional milling, grinding, and sawing equipment. Heat treatment should be performed by qualified personnel following established procedures for AISI O1 oil-hardening steel, including proper preheat, austenitizing, and quenching in oil. Always allow material to reach uniform temperature before quenching to minimize distortion. Follow applicable shop safety standards when handling hot material and quench oils.