Starrett 53964 O1 Tool Steel Flat Stock 1/16x4x18 in

Product Description

The STARRETT 53964 is an O1 oil-hardening tool steel flat stock bar used in precision toolmaking, die making, and fixture fabrication. Manufactured to AISI Type O1 specification, this flat stock measures 1/16 inch thick, 4 inches wide, and 18 inches long. Thickness tolerance is held to plus or minus 0.001 inches, making it suitable for applications where close dimensional control is required before heat treatment. Machinists and tool-and-die makers rely on O1 flat stock for its consistent pre-hardened composition and predictable response to oil-quench hardening. Weight is 1.28 pounds per piece.

O1 tool steel flat stock is used primarily in job shops, tool rooms, and maintenance-repair-operations environments. Typical applications include blanking dies, punches, gauges, jigs, and small cutting tools. The 4-inch width and 18-inch length make this bar suitable for medium-sized tooling blanks that require further machining and then oil-quench heat treatment. Machinists, tool-and-die makers, and precision fabricators are the primary users of this material.

Key Features

• AISI Type O1 oil-hardening tool steel composition for predictable heat treat response
• Thickness held to plus or minus 0.001 inches for tight pre-machined dimensional control
• Width tolerance of 0.0000 to 0.0050 inches (minus side only)
• Length tolerance of plus 0.250 inches, minus 0
• Edge squareness held to 0.003 inches per inch on all edges
• Ready to machine, grind, and oil-quench harden

Compatibility

Designed as a general-purpose O1 oil-hardening tool steel flat stock suitable for toolroom and die-making applications where AISI Type O1 material specification is required.

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 oil-quench procedures for AISI O1 tool steel. Handle edges with care, as ground flat stock edges can be sharp. Store flat to prevent warping prior to machining.