Starrett 56965 O1 Tool Steel Flat Stock 3/16x3x18 in

Product Description

The STARRETT 56965 is an O1 oil-hardening tool steel flat stock bar sized at 3/16 inches thick, 3 inches wide, and 18 inches long. O1 is a general-purpose, oil-quenched tool steel widely used in toolroom and machine shop applications where good wear resistance and dimensional stability after heat treatment are required. This flat stock ships in an annealed condition, allowing it to be machined, ground, and then hardened in oil. Thickness and width tolerances are held to +0.010 to +0.015 inches, with a length tolerance of +0.250 inches. Edge squareness is controlled to 0.003 inches per inch, making it suitable for precision layout and tool fabrication work. It weighs approximately 2.87 pounds per piece.

This flat stock is used by machinists, toolmakers, and die makers in job shops, maintenance facilities, and manufacturing environments. Typical applications include punches, dies, gauges, jigs, fixtures, and cutting tools. The 3/16-inch thickness makes it well suited for thin punch and die plate work, small blanking tools, or precision flat components requiring heat treatment after machining. It is sized for single-piece use and is appropriate wherever AISI O1 oil-hardening tool steel stock is specified.

Key Features

• AISI Type O1 oil-hardening tool steel for good wear resistance and toughness after hardening
• Thickness: 3/16 inches with a tolerance of +0.010 to +0.015 inches
• Width: 3 inches with a tolerance of +0.010 to +0.015 inches
• Length: 18 inches with a tolerance of +0.250 inches
• Edge squareness held to 0.003 inches per inch on all edges
• Supplied in annealed condition, ready for machining and subsequent heat treatment

Compatibility

Designed as a standard AISI O1 oil-hardening tool steel flat stock suitable for toolroom, die-making, and general precision machining applications where O1 material specification is required.

Installation Notes

Machining and grinding of O1 tool steel should be performed prior to heat treatment. Oil quenching during hardening requires appropriate personal protective equipment and adherence to shop safety procedures. Cutting, grinding, and heat treatment work should be performed by qualified machinists or toolmakers familiar with tool steel processing. Follow applicable shop safety standards and equipment manufacturer guidelines when hardening and tempering.