Starrett 54300 O1 Tool Steel Flat Stock 1/8x3/4x36 in

Product Description

The STARRETT 54300 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 1/8 inch thick, 3/4 inch wide, and 36 inches long. It holds a thickness tolerance of +/- 0.001 inches and a squareness tolerance of 0.003 inches per inch along all edges, making it suitable for applications that require close dimensional accuracy before hardening. Licensed machinists, tool and die makers, and industrial maintenance technicians typically source this material for blanks, gauges, punches, and other precision tooling components.

O1 tool steel flat stock in this size range is commonly used in light-to-medium toolmaking environments, including job shops, production facilities, and maintenance departments. The 1/8 x 3/4 inch cross-section suits thin punch blanks, forming blades, and flat die components. At 36 inches long, the bar can be cut to length on a band saw or cold saw to yield multiple blanks from a single piece. The oil-hardening grade allows controlled heat treatment without the distortion risk associated with water-hardening steels.

Key Features

• AISI Type O1 oil-hardening tool steel for predictable, low-distortion heat treatment
• Thickness tolerance of +/- 0.001 inches for tight dimensional control
• Width tolerance of 0.000 to -0.005 inches
• Length tolerance of +0.015 inches
• Squareness: all edges held to 0.003 inches per inch
• 36-inch bar length suitable for multiple cut-to-length blanks

Compatibility

Designed as a standard O1 oil-hardening tool steel flat stock bar compatible with conventional toolmaking, die-making, and precision machining workflows requiring AISI Type O1 material in a 1/8 x 3/4 x 36 inch form factor.

Installation Notes

Cutting should be performed with a band saw or cold saw rated for tool steel stock. Heat treatment and hardening of O1 tool steel must be performed by qualified personnel following established metallurgical procedures. Always wear appropriate PPE when cutting, grinding, or heat-treating tool steel. Handle bar stock carefully to avoid nicking precision-ground surfaces prior to use.