Starrett 54499 O1 Tool Steel Flat Stock 7/8x6x36 in

Product Description

The STARRETT 54499 is an O1 oil-hardening tool steel flat stock bar used in precision toolmaking, die making, and machining applications. Manufactured to AISI Type O1 specification, this flat stock measures 7/8 inch thick, 6 inches wide, and 36 inches long, and weighs approximately 53.54 pounds. Thickness tolerance is held to plus or minus 0.001 inches, making it suitable for applications where dimensional consistency is critical before heat treatment. Licensed machinists, tool-and-die makers, and industrial fabricators work with this material in both shop and production environments.

O1 tool steel flat stock is commonly used to produce punches, dies, gauges, lathe centers, reamers, and other precision tooling components. The oil-hardening grade is preferred when controlled distortion during heat treatment is required. This bar stock is supplied in the annealed condition, ready for machining prior to hardening and tempering. It is suited for both one-off tooling builds and small production runs in job shops and industrial maintenance facilities.

Key Features

• AISI Type O1 oil-hardening tool steel for predictable heat treat response and controlled distortion
• Thickness tolerance of plus or minus 0.001 inches for precise pre-machined stock dimensions
• Width tolerance of 0.000 to minus 0.005 inches ensures consistent fit in tool holders and fixtures
• Length tolerance of plus 0.015 inches allows full-length use without undersize material
• Edge squareness held to 0.003 inches per inch on all edges for layout and fixturing accuracy
• Supplied in annealed condition, ready for machining before heat treatment

Compatibility

Designed as a general-purpose O1 oil-hardening tool steel flat stock suitable for precision toolmaking, die making, and gauge fabrication applications requiring controlled distortion during oil quench heat treatment.

Installation Notes

Machining of O1 tool steel flat stock should be performed by qualified machinists using appropriate cutting tools rated for tool steel. All cutting, grinding, and drilling should be completed prior to hardening and tempering operations. Heat treatment should be performed by qualified personnel following established metallurgical procedures for AISI O1 tool steel. Proper personal protective equipment, including eye protection and heat-resistant gloves, is required when handling this material during machining and heat treat operations.