Starrett 54044 O1 Tool Steel Flat Stock 3/16x3/4x18 in

Product Description

The STARRETT 54044 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, jig building, die making, and precision machining applications. Manufactured to AISI Type O1 material specification, this flat stock measures 3/16 inches thick, 3/4 inches wide, and 18 inches long. Thickness tolerance is held to plus or minus 0.001 inches, making it suitable for applications that demand close dimensional control. At 0.72 pounds per piece, it is easy to handle at the bench. Machinists, tool-and-die makers, and maintenance technicians work with this material to fabricate custom tooling, wear plates, and precision components that will be hardened in oil after final machining.

O1 tool steel flat stock in this size is commonly used in small job shops, tool rooms, and maintenance departments. Typical applications include the production of punches, dies, gauges, small knives, and fixture components where a good balance of machinability before heat treat and wear resistance after hardening is needed. The 18-inch bar length allows for efficient blanking of multiple shorter pieces from a single stick. This stock is ordered by machinists and toolmakers who need a ready-to-machine bar that stays within tight tolerances right out of the package.

Key Features

• AISI Type O1 oil-hardening tool steel material specification
• Thickness held to plus or minus 0.001 inches for consistent fitment in precision setups
• Width tolerance of 0.000 to minus 0.005 inches for predictable stock removal allowance
• Length tolerance of plus 0.250 inches ensures full usable length
• Edge squareness held to 0.003 inches per inch on all edges
• 18-inch bar length suits bench-scale toolmaking and blanking operations

Compatibility

Designed as a standard O1 oil-hardening tool steel flat stock suitable for general toolroom use wherever AISI Type O1 material is specified for machined-and-hardened tooling components.

Installation Notes

O1 tool steel flat stock is cut, ground, and machined by toolmakers prior to heat treatment. Always use appropriate personal protective equipment when cutting or grinding tool steel. Heat treatment should be performed by qualified personnel following established procedures for O1 oil-hardening steel, including proper soak temperature and oil quench technique. Do not attempt to weld or braze O1 tool steel without consulting applicable material guidelines.