Starrett 54047 O1 Tool Steel Flat Stock 3/16x1-1/2x18 in

Product Description

The STARRETT 54047 is an O1 oil-hardening tool steel flat stock bar, sized at 3/16 inches thick, 1-1/2 inches wide, and 18 inches long. Manufactured to AISI Type O1 specifications, this flat stock is commonly used by tool and die makers, machinists, and metalworking tradespeople who need a reliable, weldable, and machinable tool steel blank that can be hardened in oil to achieve high surface hardness. Thickness tolerance is held to plus or minus 0.001 inches, providing the dimensional consistency required for precision tooling applications. At 1.43 pounds, the bar is manageable for bench work and small fixture fabrication.

O1 tool steel flat stock is used in fabricating punches, dies, cutting tools, gauges, jigs, and fixtures in both job shop and production environments. This bar is suited for applications where the stock will be machined to near-net shape before heat treatment, then oil-quenched to reach working hardness. Residential or light commercial machine shops, tool rooms, and maintenance departments commonly stock O1 flat bar in standard sizes like this for on-demand tooling needs.

Key Features

• AISI Type O1 oil-hardening tool steel — responds well to standard shop heat treatment and oil quench
• Thickness tolerance of plus or minus 0.001 inches for consistent, precision-ready blanks
• Width tolerance of 0.000 to minus 0.005 inches ensures predictable fitment in close-tolerance applications
• Length tolerance of plus 0.250 inches with no minus allowance — stock arrives at or above nominal length
• Edge squareness held to 0.003 inches per inch on all edges
• Ready-to-machine condition — no additional surface preparation required before layout and cutting

Compatibility

Designed as a standard O1 oil-hardening tool steel flat stock blank suitable for general toolmaking, die-making, and precision fixture fabrication where AISI Type O1 material specification is required.

Installation Notes

Machining and heat treatment of tool steel flat stock should be performed by qualified machinists or toolmakers familiar with O1 steel properties and oil-quench hardening procedures. Follow all applicable shop safety practices when cutting, grinding, or heat treating tool steel. Appropriate eye protection, ventilation, and fire suppression equipment are required during heat treatment operations. Allow the stock to reach ambient temperature before taking final measurements to ensure dimensional accuracy.