{"product_id":"starrett-54125-o1-tool-steel-flat-stock-3-8x3x18-in","title":"Starrett 54125 O1 Tool Steel Flat Stock 3\/8x3x18 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe STARRETT 54125 is an O1 oil-hardening tool steel flat stock bar sized at 3\/8 inches thick, 3 inches wide, and 18 inches long. AISI Type O1 tool steel is a general-purpose oil-hardening grade known for its dimensional stability during heat treatment and good wear resistance. This flat stock is machined to close tolerances, making it well-suited for fabricating tooling, dies, jigs, fixtures, and punches. The finished bar weighs approximately 5.74 pounds. Machinists, tool-and-die makers, and metalworking shops typically source this material for bench stock or job-specific blank cutting.\u003c\/p\u003e\u003cp\u003eO1 flat stock in this size range is used in both small-shop and production toolroom environments. Typical applications include the manufacture of cutting tools, gauges, mold components, and precision fixture plates where a through-hardened or surface-hardened condition is needed after machining. The bar ships in annealed condition, allowing it to be machined to final shape before oil quenching and tempering to the desired hardness.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eAISI Type O1 oil-hardening tool steel for good hardenability and wear resistance\u003c\/li\u003e\n\u003cli\u003eThickness of 3\/8 inches with tolerance of plus or minus 0.001 inches\u003c\/li\u003e\n\u003cli\u003eWidth of 3 inches with tolerance of minus 0.000 to minus 0.005 inches\u003c\/li\u003e\n\u003cli\u003eLength of 18 inches with tolerance of plus 0.250 inches\u003c\/li\u003e\n\u003cli\u003eEdge squareness held to 0.003 inches per inch on all edges\u003c\/li\u003e\n\u003cli\u003eSupplied in annealed condition for ease of machining prior to heat treat\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 for general toolroom and die-making applications requiring close-tolerance annealed stock.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eCutting and machining of tool steel flat stock should be performed with appropriate metalworking equipment by qualified machinists or tool-and-die makers. Wear appropriate PPE including eye protection and gloves when cutting or grinding. Heat treatment — including oil quenching and tempering — should follow established metallurgical procedures for AISI O1 tool steel and be performed by qualified personnel. Do not use torch cutting methods where dimensional accuracy of the finished blank must be maintained.\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: 3\/8 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 3 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: plus or minus 0.001 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth Tolerance\u003c\/strong\u003e: minus 0.000 to minus 0.005 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Tolerance\u003c\/strong\u003e: plus 0.250 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: 5.74 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: 54125\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51539259556146,"sku":"54125","price":252.31,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6555d28ffd7e02d6cc316d25961d7428_9cb5d932-2051-448c-81e2-2c58b5130a87.jpg?v=1785837355","url":"https:\/\/voomisupply.com\/products\/starrett-54125-o1-tool-steel-flat-stock-3-8x3x18-in","provider":"Voomi Supply","version":"1.0","type":"link"}