Starrett 58894 O1 Oil-hardening Flat Stock Tool Steel

Product Description

The STARRETT 58894 is an O1 oil-hardening flat stock bar made from AISI Type O1 tool steel, a standard material for toolmaking, jigs, punches, and precision machined components. It measures 0.125 inches thick, 0.25 inches wide, and 36 inches long, with a weight of 0.32 pounds. Thickness tolerance is held to plus or minus 0.001 inches, making this stock suitable for applications that require tight dimensional control before or after hardening. Machinists, tool and die makers, and industrial maintenance technicians work with this material when building or refurbishing precision tooling.

O1 tool steel flat stock in this size is commonly used in fabrication shops, tool rooms, and maintenance departments for producing small punches, form tools, guide strips, and wear plates. The 36-inch length allows multiple blanks to be cut from a single piece. Its small cross-section of 0.125 inches by 0.25 inches suits fine tooling applications where material removal is minimal and dimensional accuracy is critical. This stock is supplied in the annealed condition and is intended for machining prior to oil hardening and tempering.

Key Features

• AISI Type O1 oil-hardening tool steel construction for reliable heat-treat response
• Thickness of 0.125 inches with a tolerance of plus or minus 0.001 inches for precise fitment
• Width of 0.25 inches with a tolerance of 0.000 to minus 0.005 inches
• Length of 36 inches with a length tolerance of plus 0.015 inches
• Edge squareness held to 0.003 inches per inch across all edges
• Weighs 0.32 pounds per 36-inch bar

Compatibility

Designed as a standard-dimension O1 oil-hardening flat stock suitable for general toolmaking and precision machining applications where AISI Type O1 tool steel stock in this cross-section is specified.

Installation Notes

This stock is typically processed by machinists or tool and die makers using conventional milling, grinding, and sawing equipment. Material should be machined to final dimension in the annealed state before heat treatment. Oil hardening and tempering operations should follow the material supplier guidelines for AISI O1 tool steel and be performed by personnel familiar with heat-treat procedures. Handle cut edges with care as they may be sharp.