Starrett 54107 O1 Tool Steel Flat Stock 5/16x2x18 in

Product Description

The STARRETT 54107 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die work, and precision machining applications. Manufactured to AISI Type O1 specifications, this flat stock measures 5/16 inches thick, 2 inches wide, and 18 inches long, with a weight of 3.19 pounds. Thickness and squareness tolerances are 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 precision fabricators rely on O1 material for its predictable oil-quench hardening response and stable dimensional behavior through the hardening process.

O1 tool steel flat stock is used in the fabrication of cutting tools, punches, dies, gauges, and fixtures across both job shop and production toolroom environments. This bar is supplied in the annealed condition, ready for machining to final shape prior to heat treatment. The 18-inch length accommodates a wide range of toolroom blank requirements without excessive material waste. Width tolerance is controlled at 0.000 to minus 0.005 inches, and length tolerance is held to plus 0.250 inches, giving machinists a consistent starting point for layout and stock removal.

Key Features

• AISI Type O1 oil-hardening tool steel for predictable heat treat response
• Thickness and squareness tolerances held to plus or minus 0.001 inches
• Width tolerance: 0.000 to minus 0.005 inches for consistent stock sizing
• Length tolerance: plus 0.250 inches
• Edge squareness: all edges 0.003 inches per inch
• Supplied in annealed condition, ready for machining prior to hardening

Compatibility

Designed as a standard O1 oil-hardening tool steel flat stock blank for use in toolroom, die shop, and precision machining applications requiring AISI Type O1 material.

Installation Notes

O1 tool steel flat stock is worked by machinists and tool and die makers using conventional machining equipment before heat treatment. Always anneal or stress-relieve the workpiece if significant stock has been removed prior to hardening. Oil quench per the material specification during heat treatment; consult AISI O1 heat treat data for appropriate austenitizing and quench parameters. Handle annealed stock carefully to avoid surface nicks or burrs that can affect tolerance-critical surfaces after final grinding.