Starrett 54377 O1 Tool Steel Flat Stock 1/4x7x36 in

Product Description

The STARRETT 54377 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die work, jig fabrication, and precision machining applications. It measures 0.25 inches thick, 7 inches wide, and 36 inches long, with a weight of 17.85 pounds. Manufactured to AISI Type O1 specification, this flat stock holds tight dimensional tolerances, making it suitable for applications where consistent stock size is critical before heat treatment. Licensed machinists, tool and die makers, and industrial fabricators work with this material when building punches, dies, gauges, and similar precision tooling components.

This flat stock is used in machine shops, tool rooms, and fabrication environments that require pre-hardened or ready-to-harden stock. The O1 grade is well suited for short-run tooling, blanks, and fixtures in both prototype and production settings. At 7 inches wide and 36 inches long, it provides sufficient area for large blanks or multiple smaller parts to be laid out and machined before the oil-hardening process is applied.

Key Features

• AISI Type O1 oil-hardening tool steel for reliable, consistent heat treatment response
• Thickness tolerance of plus or minus 0.001 inches for precise stock sizing
• Width tolerance of 0.000 to minus 0.005 inches
• Length tolerance of plus 0.015 inches
• Edge squareness held to 0.003 inches per inch on all edges
• Full 36-inch length supports large blanks or multiple part layouts

Compatibility

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

Installation Notes

Cutting and machining of tool steel flat stock should be performed by qualified machinists using appropriate carbide or high-speed tooling. All heat treatment, including oil hardening, should follow established metallurgical procedures for AISI O1 tool steel and be performed by qualified personnel. Handle large stock sections carefully due to weight. Wear appropriate personal protective equipment when cutting, grinding, or machining.