{"product_id":"starrett-57001-o1-tool-steel-flat-stock-3-8x1x18-in","title":"Starrett 57001 O1 Tool Steel Flat Stock 3\/8x1x18 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe STARRETT 57001 is an O1 oil-hardening tool steel flat stock bar intended for toolmakers, machinists, and die makers who need precise, ready-to-machine steel in a known alloy. The bar measures 0.375 inches thick, 1 inch wide, and 18 inches long, with a weight of 1.91 pounds. O1 tool steel is an oil-hardening grade known for its dimensional stability during heat treatment and good wear resistance after hardening, making it a reliable choice for punches, dies, gauges, and general tooling applications. Thickness and width tolerances are held to +0.0100 to 0.0150 inches, and edge squareness is held to 0.003 inches per inch.\u003c\/p\u003e\u003cp\u003eThis flat stock is suited for job shops, tool and die operations, and maintenance departments requiring short-run tooling material. The 18-inch length provides a practical starting blank for cutting, milling, grinding, or turning down to final dimensions. The material ships in its annealed, pre-hardened state, which allows conventional machining before oil quenching to final hardness. It is appropriate for both prototype and production tooling work in shop environments.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eAISI Type O1 oil-hardening tool steel for predictable hardening response\u003c\/li\u003e\n\u003cli\u003eThickness: 0.375 inches with +0.0100 to 0.0150 inch tolerance\u003c\/li\u003e\n\u003cli\u003eWidth: 1 inch with +0.0100 to 0.0150 inch tolerance\u003c\/li\u003e\n\u003cli\u003eLength: 18 inches with +0.2500 inch tolerance\u003c\/li\u003e\n\u003cli\u003eEdge squareness held to 0.003 inches per inch on all edges\u003c\/li\u003e\n\u003cli\u003eWeight: 1.91 pounds per piece\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a general-purpose O1 tool steel flat bar suitable for machined tooling, dies, punches, gauges, and similar shop-fabricated components requiring oil-hardening steel stock.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eMaterial arrives in the annealed condition and should be machined using standard high-speed steel or carbide tooling appropriate for tool steel. Leave grinding or finish stock allowance before heat treatment, as oil quenching will produce minor distortion. Hardening should be performed by a qualified heat treater familiar with O1 alloy procedures. Always allow the bar to reach ambient temperature before precision layout or measurement.\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: 0.375 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 1 inch\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\u003eSquareness\u003c\/strong\u003e: 0.003 inches per inch on all edges\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1.91 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 31231200\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: 57001\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51542332211506,"sku":"57001","price":155.27,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6555d28ffd7e02d6cc316d25961d7428_268fd43a-87a1-42f5-8176-29b6ae5d87b2.jpg?v=1785898453","url":"https:\/\/voomisupply.com\/products\/starrett-57001-o1-tool-steel-flat-stock-3-8x1x18-in","provider":"Voomi Supply","version":"1.0","type":"link"}