{"product_id":"starrett-56973-o1-tool-steel-flat-stock-0-25x0-75x18-in","title":"Starrett 56973 O1 Tool Steel Flat Stock 0.25x0.75x18 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe STARRETT 56973 is an O1 oil-hardening tool steel flat stock bar measuring 0.25 inches thick, 0.75 inches wide, and 18 inches long. Made from AISI Type O1 tool steel, this flat stock is supplied in the annealed (soft) condition, ready for machining, grinding, and finishing before oil-quench hardening. It is a standard choice for toolmakers, machinists, and die shops fabricating punches, dies, gauges, jigs, fixtures, and other precision tooling components. The controlled tolerances and edge squareness make it suitable for applications where dimensional consistency prior to heat treatment is critical.\u003c\/p\u003e\n\u003cp\u003eThis flat stock is used in machine shops, tool and die operations, and maintenance and repair environments where O1 tool steel is specified. Its 18-inch length provides a practical starting blank for a range of small-to-medium tooling projects. The piece weight of approximately 0.96 pounds makes it easy to handle at the bench. Machinists select O1 flat stock when moderate wear resistance, good machinability, and straightforward oil-hardening heat treatment are the priorities. It is not intended for high-speed or high-heat cutting applications.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eAISI Type O1 oil-hardening tool steel — machines cleanly in the annealed state and responds well to oil quench hardening\u003c\/li\u003e\n  \u003cli\u003eThickness tolerance of +0.0100 to +0.0150 inches for consistent stock removal calculations\u003c\/li\u003e\n  \u003cli\u003eWidth tolerance of +0.0100 to +0.0150 inches across the 0.75-inch face\u003c\/li\u003e\n  \u003cli\u003eLength tolerance of +0.2500 inches on the 18-inch nominal length\u003c\/li\u003e\n  \u003cli\u003eEdge squareness held to 0.003 inches per inch on all edges\u003c\/li\u003e\n  \u003cli\u003eSingle-piece packaging with no minimum order beyond one unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard O1 oil-hardening tool steel flat stock blank suitable for general toolmaking, die making, and precision machining applications where AISI Type O1 material is specified.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eMachining and grinding of O1 tool steel flat stock should be performed using tooling and speeds appropriate for annealed tool steel. Heat treatment — including hardening and tempering — should be carried out by qualified personnel following established metallurgical procedures for AISI O1 tool steel. Wear appropriate PPE when cutting, grinding, or handling sharp-edged stock. Consult applicable shop safety codes and material safety data when performing heat-treat operations.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Tool Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Specification\u003c\/strong\u003e: AISI Type O1 Oil Hardening\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e: 0.25 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 0.75 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 18 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThickness Tolerance\u003c\/strong\u003e: +0.0100 to +0.0150 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth Tolerance\u003c\/strong\u003e: +0.0100 to +0.0150 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Tolerance\u003c\/strong\u003e: +0.2500 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEdge Squareness\u003c\/strong\u003e: 0.003 inches per inch on all edges\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.96 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 31231200\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: STARRETT\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 56973\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51542996910386,"sku":"56973","price":75.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6555d28ffd7e02d6cc316d25961d7428_7e89c9fd-ca88-4af8-bf62-a39ea06c60a2.jpg?v=1785913330","url":"https:\/\/voomisupply.com\/products\/starrett-56973-o1-tool-steel-flat-stock-0-25x0-75x18-in","provider":"Voomi Supply","version":"1.0","type":"link"}