Starrett 54351 O1 Tool Steel Flat Stock 3/16 X 8 X 36 in

Product Description

The STARRETT 54351 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die work, jig fabrication, and precision machining applications. Manufactured to AISI Type O1 material specification, this flat stock measures 3/16 inches thick, 8 inches wide, and 36 inches long, and weighs approximately 15.3 pounds. Thickness tolerance is held to +/- 0.001 inches, making it suitable for applications that demand tight dimensional control. O1 tool steel offers good machinability in the annealed state and responds well to oil-quench hardening, which makes it a common choice for custom tooling, blanks, and wear components across machine shops and tool rooms.

This flat stock is intended for professional use in machine shops, tool-and-die operations, and maintenance departments where raw tool steel stock needs to be cut, machined, and heat-treated to final dimensions. The 8-inch width and 36-inch length provide sufficient material for fabricating punches, dies, guides, bushings, and other precision components. It is appropriate for both small-batch custom work and single-piece tooling projects. Licensed machinists and toolmakers are the primary users of this stock.

Key Features

• AISI Type O1 oil-hardening tool steel for reliable heat-treat response
• Thickness held to +/- 0.001 inches for precision fitment
• Width tolerance of 0.0000 to -0.005 inches ensures consistent stock removal allowance
• Length tolerance of +0.015 inches provides full usable length
• Edge squareness of 0.003 inches per inch across all edges
• Good machinability in annealed condition prior to hardening

Compatibility

Designed as a general-purpose O1 oil-hardening tool steel flat stock suitable for toolmaking, die fabrication, and precision machining applications requiring AISI Type O1 material specification.

Installation Notes

Cutting and machining should be performed in the annealed state before any heat-treatment operation. Oil-hardening and tempering of O1 tool steel should be carried out by qualified personnel following established heat-treatment procedures and appropriate shop safety practices. Wear appropriate PPE when sawing, grinding, or machining tool steel. Always verify final dimensions after machining and before hardening, as heat treatment may cause minor dimensional change.