Starrett 54324 O1 Tool Steel Flat Stock 5/32x1/2x36 in

Product Description

The STARRETT 54324 is a precision-ground O1 oil-hardening tool steel flat stock bar intended for toolmakers, machinists, and die makers who require tight dimensional tolerances in raw stock form. Manufactured to AISI Type O1 specifications, this flat bar measures 5/32 inches thick, 1/2 inch wide, and 36 inches long, with a thickness tolerance of plus or minus 0.001 inches. At 0.8 pounds, the bar is easy to handle during layout and machining operations. O1 tool steel offers excellent machinability in the annealed state and responds well to oil-quench hardening, making it a standard choice for punches, dies, gauges, and cutting tools.

This flat stock is suited for use in machine shops, tool rooms, and maintenance environments where custom tooling or replacement parts are fabricated in-house. It is appropriate for both small-shop and production environments requiring precise, ready-to-machine raw material. The 36-inch length provides ample stock for multiple short parts or a single longer tool blank. Professionals in manufacturing, metalworking, and industrial maintenance routinely work with this material when building fixtures, jigs, or precision tools from raw bar stock.

Key Features

• AISI Type O1 oil-hardening tool steel for reliable heat-treat response
• Thickness tolerance of plus or minus 0.001 inches for consistent fit in close-tolerance applications
• Width tolerance of 0.000 to 0.005 inches under nominal
• Length tolerance of plus 0.015 inches, minus 0 inches
• Squareness held to 0.003 inches per inch on all edges
• Annealed condition allows standard machining before hardening

Compatibility

Designed as a standard raw material blank for toolmaking and machining applications requiring AISI O1 oil-hardening tool steel flat bar stock in 5/32 x 1/2 x 36 inch dimensions.

Installation Notes

Cutting and machining of tool steel flat stock should be performed with appropriate metalworking equipment by qualified machinists or toolmakers. Secure the workpiece firmly before any cutting, grinding, or drilling operation. Heat treatment, including oil quenching, should follow established metallurgical procedures and applicable shop safety protocols. Personal protective equipment including eye protection and heat-resistant gloves is required during any thermal processing.