{"product_id":"starrett-54428-o1-tool-steel-flat-stock-7-16x3-4x36in","title":"Starrett 54428 O1 Tool Steel Flat Stock 7\/16x3\/4x36in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe STARRETT 54428 is an O1 oil-hardening tool steel flat stock bar sized at 7\/16 inches thick, 3\/4 inches wide, and 36 inches long. Manufactured to AISI Type O1 specifications, this flat stock is used as raw material for fabricating cutting tools, punches, dies, gauges, and precision tooling components. O1 tool steel offers good machinability in the annealed state and achieves high hardness after oil-quench heat treatment. The 54428 ships in a soft, machinable condition, allowing the fabricator to machine to final shape before hardening. Weight is 3.35 pounds per bar.\u003c\/p\u003e\u003cp\u003eO1 flat stock of this profile is commonly used in toolroom, die shop, and general metalworking environments where close-tolerance blanks are required. Typical applications include blanking dies, forming tools, shear blades, and precision gauging fixtures. The 36-inch length provides a standard stock length suitable for cutting multiple shorter blanks on a bandsaw or cold saw. Machinists and tool-and-die makers are the primary users of this material.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eAISI Type O1 oil-hardening tool steel — good machinability before heat treat, high hardness after quench\u003c\/li\u003e\n\u003cli\u003eThickness tolerance of plus or minus 0.001 inches for consistent stock removal planning\u003c\/li\u003e\n\u003cli\u003eWidth tolerance of 0.000 to minus 0.005 inches for tight dimensional control\u003c\/li\u003e\n\u003cli\u003eLength tolerance of plus 0.015 inches\u003c\/li\u003e\n\u003cli\u003eSquareness: edge all 0.003 inches per inch\u003c\/li\u003e\n\u003cli\u003eSupplied in annealed condition — ready for machining prior to hardening\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard AISI O1 oil-hardening tool steel flat bar suitable for general toolroom and die-making applications requiring a 7\/16 inch by 3\/4 inch cross-section profile.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis material is installed by machinists and tool-and-die makers using standard metalworking equipment including milling machines, surface grinders, and bandsaws. Heat treatment should be performed by qualified personnel following established procedures for AISI O1 tool steel, including proper preheat, austenitizing, and oil-quench cycles. Always allow material to reach ambient temperature before precision grinding after hardening. Follow applicable shop safety practices when cutting or grinding tool steel.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\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: 7\/16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 3\/4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 36 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness Tolerance\u003c\/strong\u003e: plus or minus 0.001 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth Tolerance\u003c\/strong\u003e: 0.000 to minus 0.005 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Tolerance\u003c\/strong\u003e: plus 0.015 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquareness\u003c\/strong\u003e: Edge all 0.003 inches per inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 3.35 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\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: 54428\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51540654194994,"sku":"54428","price":228.71,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6555d28ffd7e02d6cc316d25961d7428_8802250a-08e0-4f98-b5fe-7b9cfd3dee67.jpg?v=1785860987","url":"https:\/\/voomisupply.com\/products\/starrett-54428-o1-tool-steel-flat-stock-7-16x3-4x36in","provider":"Voomi Supply","version":"1.0","type":"link"}