Starrett 54054 O1 Tool Steel Flat Stock 3/16x5x18 in

Product Description

The STARRETT 54054 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die work, fixture building, and precision machining applications. Manufactured to AISI Type O1 material specification, this flat stock measures 3/16 inches thick, 5 inches wide, and 18 inches long, with a weight of 4.78 pounds. Thickness tolerance is held to plus or minus 0.001 inches, and squareness along edges is controlled to 0.003 inches per inch. These tight tolerances make it a reliable starting blank for machinists, toolmakers, and fabricators who need predictable stock removal and consistent hardening response.

O1 tool steel flat stock is suited for machine shops, tool and die operations, and maintenance departments in both industrial and commercial environments. This bar is typically used to produce punches, dies, cutting tools, gauges, and fixtures requiring oil-quench hardening. The 18-inch length and 5-inch width provide usable blank area for multiple tool profiles or a single large component. Length tolerance runs plus 0.250 inches with no negative deviation, allowing for full-length usability after facing. Width tolerance runs from zero to minus 0.005 inches.

Key Features

• AISI Type O1 oil-hardening tool steel material specification
• Thickness held to plus or minus 0.001 inches for consistent grinding and machining setups
• Edge squareness controlled to 0.003 inches per inch across all edges
• Length tolerance of plus 0.250 inches, zero negative, ensures full nominal length is delivered
• Width tolerance of zero to minus 0.005 inches for predictable fit in blind pockets and fixtures
• 4.78-pound bar suitable for handling and transport as a single piece

Compatibility

Designed as a standard O1 oil-hardening tool steel flat stock blank for general toolmaking, die making, and precision machining applications requiring oil-quench heat treatment.

Installation Notes

Tool steel flat stock is cut, ground, and machined by skilled machinists or toolmakers using appropriate metalworking equipment. Secure workholding is required during all machining operations. Heat treatment of O1 steel requires oil quenching and must be performed by qualified personnel following established metallurgical procedures. Follow applicable shop safety standards and wear appropriate PPE when cutting or grinding tool steel.