Starrett 53960 O1 Tool Steel Flat Stock 1/16x2x18 in

Product Description

The STARRETT 53960 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die making, and precision machining applications. Manufactured from AISI Type O1 tool steel, this flat stock measures 1/16 inch thick, 2 inches wide, and 18 inches long, with a weight of 0.64 pounds. Thickness and squareness tolerances are held to plus or minus 0.001 inches, making this stock suitable for applications where close dimensional control is required before hardening. Machinists, toolmakers, and die shops rely on O1 flat stock as a starting blank for punches, dies, gauges, and fixtures.

O1 tool steel flat stock is used in both job shop and production toolroom environments. It is commonly machined in the annealed state, then oil-quenched and tempered to achieve working hardness. This bar is appropriate for fabricating small punches, blades, form tools, and precision fixtures where dimensional stability through heat treatment is critical. The 18-inch length provides a workable starting blank for most bench-machined tooling components.

Key Features

• AISI Type O1 oil-hardening tool steel construction for predictable heat-treat response
• Thickness of 1/16 inch with plus or minus 0.001 inch tolerance for close-tolerance blanks
• Width of 2 inches with a tolerance of 0.000 to minus 0.005 inches
• Length of 18 inches with a plus 0.250 inch length tolerance
• Edge squareness held to 0.003 inches per inch on all edges
• Supplied in annealed condition, ready for machining and subsequent oil hardening

Compatibility

Designed as a standard O1 oil-hardening tool steel flat stock blank for use in toolroom, die shop, and precision machining applications requiring AISI Type O1 material specification.

Installation Notes

O1 tool steel flat stock is machined and shaped by qualified toolmakers or machinists using standard milling, grinding, and drilling equipment. Heat treatment, including oil quenching and tempering, should be performed by qualified personnel following established metallurgical procedures for AISI Type O1 tool steel. Always allow parts to reach ambient temperature before measuring to final tolerance. Secure workpieces properly during machining to avoid deflection of thin cross-sections.