5/16″ X 10″ X 18″ Starrett Precision Ground Flat Stock AISI O-1 Oil Hardened Steel 58728 Fan Favorite

5/16″ X 10″ X 18″ Starrett Precision Ground Flat Stock | AISI O-1 Oil Hardened Steel | 58728 is Starrett precision ground flat stock, supplied ground flat, square and parallel in aisi o-1 oil hardened steel so it goes straight into layout, fixturing and machining work without further surfacing.

Precision ground flat stock provides straight, square surfaces for accurate machining and part alignment

AISI O-1 oil hardened steel delivers hardness after heat treatment, supporting durable tooling and form operations

Suitable for custom blades, dies, jigs, fixtures, and prototype tooling

Good machinability for clean toolpaths and reliable finishing in fabrication workflows

Specifications

Material: AISI O-1 oil hardened tool steel

Thickness: 5/16 inch

Width: 10 inch

Length: 18 inch

Piece count: 1

Form: Flat stock, precision ground

Dimensions: 5/16 inch thick x 10 inch wide x 18 inch long

Finish: Precision ground, flat surfaces; no coatings

Configuration: One piece

Applications

Tooling and die making

Metal fabrication and prototype development

Custom blade and knife making

Jig and fixture construction

Educational workshop projects requiring precise flat stock