Starrett 53954 O1 Tool Steel Flat Stock 1/16x1/2x18 in

Product Description

The STARRETT 53954 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die making, punches, and precision machining applications. Manufactured to AISI Type O1 specification, this flat stock measures 1/16 inch thick, 1/2 inch wide, and 18 inches long, with a thickness tolerance of plus or minus 0.001 inches. The tight dimensional tolerances make it suitable for applications where accurate blank stock is required before hardening and grinding. At 0.16 pounds, it is a single-piece unit ready for layout, cutting, and heat treatment. Machinists, tool and die makers, and maintenance professionals typically work with this material.

This flat stock is suited for fabricating small punches, blades, gauges, jigs, and fixture components in both job shop and maintenance environments. It performs well in applications requiring a balance of machinability in the annealed state and good hardness after oil quenching. The 18-inch length provides a practical working blank for most bench-scale tooling projects. Edge squareness is held to 0.003 inches per inch across all edges, supporting accurate layout and sawing operations without additional truing.

Key Features

• AISI Type O1 oil-hardening tool steel for predictable heat treat response
• Thickness: 1/16 inch with plus or minus 0.001 inch tolerance
• Width: 1/2 inch with tolerance of 0.000 to minus 0.005 inches
• Length: 18 inches with plus 0.250 inch length tolerance
• Edge squareness held to 0.003 inches per inch on all edges
• Single-piece package at 0.16 pounds — no minimum order beyond one piece

Compatibility

Designed as a standard annealed O1 tool steel flat stock blank compatible with conventional oil-quench heat treating processes used in tool and die, maintenance machining, and precision fabrication applications.

Installation Notes

O1 tool steel flat stock is worked by machinists and tool and die makers using standard metal cutting, grinding, and drilling equipment. Material should be in the annealed condition before machining. Heat treatment, including hardening and tempering, should be performed by qualified personnel following established metallurgical procedures for AISI O1 steel. Always use appropriate PPE when cutting, grinding, or heat treating tool steel.