{"product_id":"starrett-54104-o1-tool-steel-flat-stock-5-16x1x18-in","title":"Starrett 54104 O1 Tool Steel Flat Stock 5\/16x1x18 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe STARRETT 54104 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die making, punch fabrication, and precision machining applications. Manufactured from AISI Type O1 tool steel, this flat stock measures 5\/16 inches thick, 1 inch wide, and 18 inches long, with a weight of 1.59 pounds. The O1 grade offers good machinability in the annealed state and responds well to oil-quench hardening, making it a reliable choice for cutting tools, gauges, jigs, and fixtures. Tight dimensional tolerances are held throughout, supporting accurate stock removal and finished-part repeatability in both shop and production environments.\u003c\/p\u003e\u003cp\u003eThis flat stock is suited for machine shops, tool and die operations, and maintenance departments requiring a readily machinable tool steel that can be hardened and tempered to working hardness after rough shaping. Typical uses include blanks for custom punches, form tools, stripper plates, wear pads, and hand tools. The 18-inch length provides sufficient material for multiple smaller blanks or a single longer workpiece, and the 1-inch width suits a wide range of standard tooling layouts.\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 close-tolerance stock\u003c\/li\u003e\n\u003cli\u003eWidth tolerance of 0.000 to 0.005 inches under nominal\u003c\/li\u003e\n\u003cli\u003eLength tolerance of plus 0.250 inches, minus 0 inches\u003c\/li\u003e\n\u003cli\u003eEdge squareness held to 0.003 inches per inch on all edges\u003c\/li\u003e\n\u003cli\u003eReady-to-machine annealed condition straight from stock\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 work, and precision fixture fabrication across machine shop and industrial maintenance applications.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eCutting, grinding, and machining should be performed by qualified machinists or toolmakers using appropriate metalworking equipment. Follow standard shop safety practices including eye protection, secure workholding, and proper coolant use when cutting or grinding. Heat treatment requires controlled furnace equipment and appropriate quenching media; follow the material supplier heat-treat guidelines for AISI O1 tool steel. Handle cut edges with care, as sharp burrs are common after sawing or shearing.\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: 5\/16 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: plus or minus 0.001 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth Tolerance\u003c\/strong\u003e: 0.000 to 0.005 inches under nominal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Tolerance\u003c\/strong\u003e: plus 0.250 inches, minus 0 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: 1.59 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: 54104\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51542043820338,"sku":"54104","price":109.53,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6555d28ffd7e02d6cc316d25961d7428_0112ca00-e455-46f7-bd28-9aec19609db3.jpg?v=1785890392","url":"https:\/\/voomisupply.com\/products\/starrett-54104-o1-tool-steel-flat-stock-5-16x1x18-in","provider":"Voomi Supply","version":"1.0","type":"link"}