{"product_id":"starrett-54108-o1-tool-steel-flat-stock-5-16x2-1-2x18-in","title":"Starrett 54108 O1 Tool Steel Flat Stock 5\/16x2-1\/2x18 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe STARRETT 54108 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die-making, and precision machining applications. It is manufactured from AISI Type O1 tool steel, which responds well to oil-quench hardening and is widely used for punches, dies, gauges, and cutting tools. The bar measures 5\/16 inches thick, 2-1\/2 inches wide, and 18 inches long, with a weight of approximately 3.99 pounds. Thickness tolerance is held to plus or minus 0.001 inches, making this stock suitable for applications where dimensional consistency before and after hardening is critical. Machinists and tool-and-die makers typically work this material in the annealed condition before heat treatment.\u003c\/p\u003e\u003cp\u003eThis flat stock is suited for job shops, toolrooms, and maintenance departments that fabricate custom tooling, jigs, fixtures, or wear components. Its flat-bar form makes it efficient to saw, mill, grind, or drill to net shape prior to hardening. The 18-inch length provides adequate stock for a range of small to mid-size tooling blanks, and the 2-1\/2-inch width accommodates wider die sections and plates without requiring a weld or lamination.\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: 5\/16 inches with tolerance of plus or minus 0.001 inches\u003c\/li\u003e\n\u003cli\u003eWidth: 2-1\/2 inches with tolerance of 0.000 to minus 0.005 inches\u003c\/li\u003e\n\u003cli\u003eLength: 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, ready for machining prior to hardening\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a general-purpose O1 tool steel flat stock bar for use in toolroom, die-making, and precision machining environments where AISI Type O1 oil-hardening material is specified.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis material is worked by machinists and tool-and-die makers using conventional milling, sawing, grinding, and drilling equipment. All machining should be completed in the annealed condition before any heat-treatment process. Oil-hardening heat treatment should be performed by a qualified heat treater following established procedures for AISI O1 tool steel. Handle ground or finish-machined surfaces carefully to avoid nicking or scratching critical tolerance areas prior to hardening.\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: 2-1\/2 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: 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: 3.99 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: 54108\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51538804834610,"sku":"54108","price":195.35,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6555d28ffd7e02d6cc316d25961d7428_6fc88581-1622-473f-a339-2074b1c0f791.jpg?v=1785826976","url":"https:\/\/voomisupply.com\/products\/starrett-54108-o1-tool-steel-flat-stock-5-16x2-1-2x18-in","provider":"Voomi Supply","version":"1.0","type":"link"}