Starrett 53985 O1 Tool Steel Flat Stock 3/32x3x18 in

Product Description

The STARRETT 53985 is an O1 oil-hardening tool steel flat stock bar intended for toolmakers, machinists, and die makers who need a precision-ground blank ready for layout, machining, and heat treatment. Manufactured to AISI Type O1 specifications, this flat stock measures 3/32 inches thick, 3 inches wide, and 18 inches long and ships at approximately 1.43 pounds. Thickness tolerance is held to plus or minus 0.001 inches, making it suitable for applications where dimensional accuracy before hardening is critical. O1 tool steel responds predictably to oil-quench hardening, giving shops consistent results across production runs.

This flat stock is used in machine shops, toolrooms, and fabrication environments for producing punches, dies, gauges, cutting tools, and fixtures. The 18-inch length provides enough material for multiple short blanks or a single medium-length tool body. The 3-inch width supports wide die sections and plate-style tooling without requiring initial milling to remove excess material. Typical users include tool and die makers, machinists, and maintenance technicians working in both job-shop and in-house toolroom settings.

Key Features

• AISI Type O1 oil-hardening tool steel for predictable heat treatment response
• Thickness held to plus or minus 0.001 inches for precise pre-machined fitment
• Width tolerance of 0.000 to minus 0.005 inches for controlled fit in close-tolerance slots
• Length tolerance of plus 0.250 inches allows full usable length after facing
• Edge squareness held to 0.003 inches per inch on all edges
• Single-piece packaging with a minimum order quantity of 1 for low-volume toolroom use

Compatibility

Designed as a general-purpose O1 tool steel flat stock blank suitable for toolroom, die, punch, gauge, and fixture applications requiring oil-hardening tool steel per AISI Type O1 material specification.

Installation Notes

O1 tool steel flat stock is worked by machinists and tool and die makers using standard metalworking equipment including mills, surface grinders, and EDM machines. Material should be stress-relieved before finish grinding when dimensional stability after heat treatment is critical. Oil-quench hardening and tempering should be performed by qualified personnel following established heat-treat procedures for AISI O1 tool steel. Always wear appropriate PPE when cutting, grinding, or heat-treating tool steel stock.