Starrett 58892 O1 Tool Steel Flat Stock 1/8x3/8x36 in

Product Description

The STARRETT 58892 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die making, jig construction, and precision machining applications. Manufactured to AISI Type O1 specification, this flat stock measures 0.125 inches thick, 0.375 inches wide, and 36 inches long, weighing 0.48 pounds per piece. The O1 grade offers good machinability in the annealed state and responds well to oil quench hardening, making it a dependable choice for fabricating punches, dies, gauges, and cutting tools. Thickness tolerance is held to plus or minus 0.001 inches, supporting tight fitment requirements in precision tooling work.

This flat stock is suited for use in machine shops, tool and die shops, and maintenance facilities where stock material must be cut, ground, or machined to finished dimensions. It is a standard raw material form for fabricating custom tooling components where oil-hardening steel properties are required. The 36-inch length allows multiple blanks to be cut from a single piece, reducing scrap and setup time. Machinists, tool and die makers, and industrial maintenance technicians are the primary users of this material.

Key Features

• AISI Type O1 oil-hardening tool steel for reliable heat-treat response
• Thickness of 0.125 inches held to plus or minus 0.001 inches tolerance
• Width of 0.375 inches with tolerance of 0.0000 to negative 0.005 inches
• Length of 36 inches with a positive length tolerance of plus 0.015 inches
• Edge squareness held to 0.003 inches per inch on all edges
• Ships as a single piece with a minimum order quantity of one

Compatibility

Designed as a standard raw stock form for use in any application requiring AISI Type O1 oil-hardening tool steel flat bar in 0.125 inches by 0.375 inches cross-section.

Installation Notes

Cutting, grinding, and machining of tool steel flat stock should be performed by qualified machinists or tool and die makers using appropriate metalworking equipment. Material should be handled in the annealed condition prior to heat treatment. Oil hardening requires controlled quench procedures in accordance with the material specification — do not substitute water or air quench without verifying compatibility with O1 grade requirements. Always wear appropriate PPE when cutting or grinding tool steel.