Starrett 54982 O1 Oil-hardening Flat Stock 7/16x7/16x24 in

Product Description

The STARRETT 54982 is an O1 oil-hardening flat stock bar made from low-carbon steel, supplied in the annealed condition for machining before heat treatment. This tool steel flat measures 7/16 inches thick by 7/16 inches wide by 24 inches long and holds a thickness tolerance of plus or minus 0.001 inches. O1 is a general-purpose oil-hardening tool steel commonly used by machinists, toolmakers, and die makers to fabricate punches, dies, gauges, and custom tooling. It machines cleanly in the soft state and responds predictably to oil-quench hardening, making it a reliable choice for precision shop applications.

This flat stock is suited for use in job shops, tool-and-die operations, maintenance departments, and fabrication environments where close-tolerance tool steel stock is required. The 24-inch length provides workable stock for most bench and mill operations. Typical applications include making custom cutting tools, jigs, fixtures, and wear parts that require hardening after machining. Width tolerance runs plus 0.000 to minus 0.005 inches and length tolerance is plus 0.625 inches, so stock length may run slightly long as supplied.

Key Features

• O1 oil-hardening tool steel for predictable hardening response with minimal distortion
• Tight thickness tolerance of plus or minus 0.001 inches for precise fit in tooling applications
• Low-carbon steel base material machines cleanly in the annealed state
• 24-inch working length suitable for most bench, lathe, and milling operations
• Square cross-section at 7/16 inches x 7/16 inches simplifies layout and setup

Compatibility

Designed as a general-purpose O1 oil-hardening tool steel flat stock for use in machining, toolmaking, and die-making applications where annealed steel stock is required prior to hardening.

Installation Notes

Machining and heat treatment of O1 tool steel should be performed by qualified machinists or toolmakers following accepted shop practices and applicable safety standards. Machine in the annealed state before hardening; improper heat treatment sequence can result in distortion or cracking. Always follow established oil-quench hardening procedures and appropriate personal protective equipment requirements when performing heat treatment. Grind or finish to final dimension after hardening as needed.