Starrett 54329 O1 Tool Steel Flat Stock 5/32x1-3/4x36 in

Product Description

The STARRETT 54329 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die making, punches, and precision fixtures. Manufactured to AISI Type O1 specification, this flat stock measures 5/32 inches thick, 1-3/4 inches wide, and 36 inches long, weighing approximately 2.79 pounds. It holds a thickness tolerance of plus or minus 0.001 inches, making it suitable for applications that require close dimensional control before and after heat treatment. Machinists, toolmakers, and job shop professionals use O1 flat stock as a starting material for custom tooling, blades, and gauges.

O1 tool steel flat stock is commonly used in machine shops, tool and die operations, and maintenance departments where a versatile, oil-quenching steel is required. The 36-inch length allows for multiple cuts from a single bar. The 5/32 by 1-3/4 inch cross-section suits thin plate tooling applications such as shims, flat punches, blanking dies, and wear plates. This material is supplied in the annealed condition and is intended for further machining, grinding, and heat treatment by the end user.

Key Features

• AISI Type O1 oil-hardening tool steel — consistent composition for predictable heat treat response
• Thickness of 5/32 inches with a tight tolerance of plus or minus 0.001 inches
• Width of 1-3/4 inches with a width tolerance of 0.000 to minus 0.005 inches
• Length of 36 inches with a length tolerance of plus 0.015 inches
• Edge squareness held to 0.003 inches per inch across all edges
• Supplied in annealed condition, ready for machining and subsequent heat treatment

Compatibility

Designed as a general-purpose O1 oil-hardening tool steel flat bar suitable for toolmaking, die making, and precision fixture fabrication across machine shop and industrial maintenance applications.

Installation Notes

Cutting, grinding, and machining of tool steel flat stock should be performed by qualified machinists or toolmakers using appropriate metalworking equipment. Heat treatment, including hardening and tempering, should follow established metallurgical procedures for AISI O1 tool steel and be carried out by personnel familiar with oil-quench hardening processes. Always use appropriate personal protective equipment when cutting or grinding tool steel. Consult applicable shop safety codes and equipment manufacturer guidelines before beginning any thermal processing.