Starrett 57016 O1 Tool Steel Flat Stock 0.5x1x18 in

Product Description

The STARRETT 57016 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die work, punches, and precision machining applications. Manufactured to AISI Type O1 specification, this flat stock measures 0.5 inches thick by 1 inch wide by 18 inches long and ships ready for layout, machining, or heat treatment. Thickness and width tolerances are held to +0.0100 to 0.0150 inches, with length tolerance of +0.2500 inches. Edge squareness is controlled to 0.003 inches per inch, making it suitable for precision toolroom use. Machinists, tool and die makers, and mold shops rely on O1 flat stock for its consistent pre-heat-treat machinability and predictable oil-quench response.

This flat stock is suited for fabricating cutting tools, gauges, jigs, fixtures, blanks, and wear components in job shops, toolrooms, and maintenance departments. The 18-inch length accommodates a wide range of toolroom cuts without excessive material waste. O1 tool steel machines well in the annealed condition and responds reliably to oil hardening, making it a standard choice when through-hardness and dimensional stability after heat treatment are required. It is appropriate for both small-quantity prototype work and short-run production tooling.

Key Features

• AISI Type O1 oil-hardening tool steel for predictable heat treatment response
• Thickness and width tolerances of +0.0100 to +0.0150 inches for accurate pre-machined fits
• Edge squareness held to 0.003 inches per inch on all edges
• Length tolerance of +0.2500 inches allows full 18-inch usable cuts
• Flat stock profile simplifies layout, sawing, and milling operations
• Single-piece minimum order quantity supports low-volume toolroom and repair shop use

Compatibility

Designed as a general-purpose O1 oil-hardening flat stock for toolroom, die, and precision machining applications where AISI Type O1 tool steel in a flat bar form is specified.

Installation Notes

Machining and heat treatment of tool steel flat stock should be performed by qualified machinists or tool and die makers familiar with O1 steel. Secure the workpiece properly before cutting or grinding to prevent movement. Always follow established heat treatment procedures for O1 oil-hardening steel, including proper preheat, hardening temperature, and quench medium selection, using equipment calibrated for toolroom work. Wear appropriate PPE when cutting, grinding, or handling hardened steel stock.