Starrett 54102 O1 Tool Steel Flat Stock 5/16x1/2x18 in

Product Description

The STARRETT 54102 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die-making, and precision machining applications. Manufactured to AISI Type O1 specifications, this flat stock measures 5/16 inches thick, 1/2 inches wide, and 18 inches long. It holds a thickness tolerance of plus or minus 0.001 inches and an edge squareness of 0.003 inches per inch, making it suitable for applications where dimensional accuracy is critical before and after heat treatment. The bar weighs 0.8 pounds and is sold as a single piece. Machinists, tool and die makers, and metal fabricators work with this stock to produce punches, dies, blades, and gauges.

O1 tool steel flat stock is used in job shops, tool rooms, and industrial fabrication environments. This bar is appropriate for applications requiring a material that machines cleanly in the annealed state and responds predictably to oil-hardening heat treatment. Typical uses include producing custom tooling, fixture components, wear plates, and small dies. The 18-inch length provides enough material for most short-run tooling projects without requiring cut-down from longer bar stock.

Key Features

• AISI Type O1 oil-hardening tool steel construction
• Thickness tolerance of plus or minus 0.001 inches for close-tolerance tooling work
• Width tolerance of 0.000 to minus 0.005 inches
• Length tolerance of plus 0.250 inches, minus 0 inches
• Edge squareness held to 0.003 inches per inch on all edges
• Single-piece packaging with no minimum order quantity beyond one unit

Compatibility

Designed as a standard O1 oil-hardening tool steel flat bar suitable for general toolmaking and die-making applications where AISI 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. Material should be handled in the annealed condition prior to heat treatment. Follow established heat-treating procedures for O1 tool steel, including proper preheat, hardening temperature, and quenching in oil, using qualified heat-treatment equipment. Always use appropriate personal protective equipment when cutting, grinding, or heat-treating tool steel.