High Quality 3/16″ X 5/16″ X 18″ Starrett Precision Ground Flat Stock AISI O-1 Oil Hardened Steel 58715

3/16″ X 5/16″ X 18″ Starrett Precision Ground Flat Stock | AISI O-1 Oil Hardened Steel | 58715 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 delivers square, true edges for accurate machining and repeatable setups

O-1 tool steel with oil hardening provides reliable hardness and wear resistance after treatment

Flat stock form minimizes secondary milling and edge preparation for tooling applications

Suitable for custom tooling, blades, jigs, fixtures, and reference surfaces

Specifications

Dimensions: 3/16 inch by 5/16 inch by 18 inch

Material: AISI O-1 oil hardened tool steel

Finish: Precision ground

Edges: Flat faces with true geometry

Applications

Toolmaking and die forming operations requiring hardened, precise stock for custom tooling

Machining and metalworking environments needing reliable flat stock for jigs, fixtures, and reference surfaces

Prototype development and small-batch production where a single-piece stock supports rapid fabrication and testing