{"product_id":"starrett-54303-o1-tool-steel-flat-stock-1-8x1-1-2x36-in","title":"Starrett 54303 O1 Tool Steel Flat Stock 1\/8x1-1\/2x36 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe STARRETT 54303 is an O1 oil-hardening tool steel flat stock bar measuring 0.125 inches thick, 1.5 inches wide, and 36 inches long. Manufactured to AISI Type O1 material specification, this flat stock is used for toolmaking, die work, jigs, fixtures, and precision machined components where consistent geometry and tight tolerances are required. Thickness tolerance is held to plus or minus 0.001 inches, length tolerance is plus 0.015 inches, and width tolerance runs from 0 to minus 0.005 inches. At 2.23 pounds, the bar is ready to cut, machine, and heat treat in a standard oil-quench process. Machinists, tool and die makers, and maintenance shops specify O1 for its predictable hardening response and good dimensional stability.\u003c\/p\u003e\u003cp\u003eO1 tool steel flat stock is used in job shops, manufacturing facilities, and maintenance departments for fabricating punches, dies, cutting tools, gauges, and wear parts. The 36-inch length allows multiple blanks to be cut from a single bar, reducing setup time. This stock is suited for applications where the finished component will be oil-hardened and tempered to achieve working hardness. Edge squareness is held to 0.003 inches per inch across all edges, supporting accurate layout and machining without additional dressing.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eAISI Type O1 oil-hardening tool steel for predictable heat treat response\u003c\/li\u003e\n\u003cli\u003eThickness tolerance of plus or minus 0.001 inches for precise fit-up\u003c\/li\u003e\n\u003cli\u003eWidth tolerance of 0 to minus 0.005 inches\u003c\/li\u003e\n\u003cli\u003eLength tolerance of plus 0.015 inches\u003c\/li\u003e\n\u003cli\u003eEdge squareness held to 0.003 inches per inch on all edges\u003c\/li\u003e\n\u003cli\u003e36-inch bar length allows multiple blanks from a single piece\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard O1 oil-hardening tool steel flat stock suitable for general toolmaking, die making, and precision fabrication applications requiring AISI Type O1 material specification.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eCutting and machining should be performed with appropriate tooling rated for tool steel stock. Oil-hardening heat treatment requires proper temperature control and a suitable quench oil bath — follow established metallurgical procedures and applicable shop safety protocols. Always wear appropriate PPE when cutting, grinding, or heat treating tool steel. Consult material safety data for handling guidance when working with cutting fluids or quench oils.\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: 0.125 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 1.5 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: 0.003 inches per inch on all edges\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 2.23 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\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: 54303\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51542712582450,"sku":"54303","price":101.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6555d28ffd7e02d6cc316d25961d7428_54226721-5879-468e-87ae-e4f590a542ff.jpg?v=1785905137","url":"https:\/\/voomisupply.com\/products\/starrett-54303-o1-tool-steel-flat-stock-1-8x1-1-2x36-in","provider":"Voomi Supply","version":"1.0","type":"link"}