{"product_id":"starrett-54416-o1-tool-steel-flat-stock-3-8x3-5x36-in","title":"Starrett 54416 O1 Tool Steel Flat Stock 3\/8x3.5x36 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe STARRETT 54416 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die making, jig fabrication, and precision machining applications. Manufactured to AISI Type O1 specification, this flat bar measures 3\/8 inch thick, 3-1\/2 inches wide, and 36 inches long, with a thickness tolerance of plus or minus 0.001 inches and a length tolerance of plus 0.015 inches. The width tolerance runs from minus 0.000 to minus 0.005 inches. O1 tool steel offers excellent machinability in the annealed state and responds consistently to oil-quench hardening, making it a go-to material for machinists and tool and die makers building custom tooling from bar stock.\u003c\/p\u003e\u003cp\u003eThis flat stock is suited for job shops, toolrooms, and maintenance departments that fabricate punches, dies, gauges, cutting tools, and fixture components. The 36-inch length provides a practical starting blank for multiple parts from a single piece. The 3\/8-inch thickness and 3-1\/2-inch width make this a mid-range flat bar appropriate for medium-duty tooling applications. It is used in both prototype and production toolroom environments where dimensional accuracy before heat treatment is critical to finished-part consistency.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eAISI Type O1 oil-hardening tool steel for consistent oil-quench heat treatment response\u003c\/li\u003e\n\u003cli\u003eThickness held to plus or minus 0.001 inches for close-tolerance blanking and grinding applications\u003c\/li\u003e\n\u003cli\u003eWidth tolerance of minus 0.000 to minus 0.005 inches ensures stock fits planned clearances\u003c\/li\u003e\n\u003cli\u003eEdge squareness of 0.003 inches per inch on all edges supports accurate layout and machining setups\u003c\/li\u003e\n\u003cli\u003e36-inch length yields multiple blanks from a single bar, reducing material waste\u003c\/li\u003e\n\u003cli\u003eWeighs 13.38 pounds per bar, suitable for bench or storage rack handling without lifting equipment\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 toolroom, die shop, and precision fabrication use wherever O1 specification material is called out.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eCutting and machining should be performed in the annealed condition before any heat treatment cycle. A licensed or qualified heat treater should perform oil quenching and tempering to achieve target hardness. Use appropriate metalworking fluids and personal protective equipment when sawing, milling, or grinding tool steel. Verify finished dimensions after rough machining and before hardening to account for any distortion during the heat treat process.\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: 3-1\/2 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: minus 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\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: 13.38 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: 54416\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51543508484402,"sku":"54416","price":513.22,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6555d28ffd7e02d6cc316d25961d7428_6805ca24-8630-4bc4-8da6-473d3e44d419.jpg?v=1785919676","url":"https:\/\/voomisupply.com\/products\/starrett-54416-o1-tool-steel-flat-stock-3-8x3-5x36-in","provider":"Voomi Supply","version":"1.0","type":"link"}