{"product_id":"starrett-54176-o1-tool-steel-flat-stock-5-8x1-1-2x18-in","title":"Starrett 54176 O1 Tool Steel Flat Stock 5\/8x1-1\/2x18 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe STARRETT 54176 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die work, punches, gauges, and precision fixtures. Manufactured to AISI Type O1 material specification, this flat stock measures 5\/8 inches thick, 1-1\/2 inches wide, and 18 inches long, and weighs approximately 4.78 pounds. O1 tool steel offers excellent machinability in the annealed state and achieves high hardness after oil-quench heat treatment, making it a dependable choice for fabricating custom tooling components. Machinists, tool-and-die makers, and maintenance professionals work with this material to produce close-tolerance parts that require a hardened working surface.\u003c\/p\u003e\u003cp\u003eThis flat stock is suited for job-shop and production toolroom environments where custom tooling, jigs, punches, or wear components are cut, machined, and heat-treated in-house. The 18-inch length provides enough material for most single-piece tooling applications without the waste associated with longer bar stock. It is stocked in the annealed condition, ready for machining prior to oil-hardening heat treatment. Typical users include tool-and-die shops, maintenance departments, and precision machine shops that require small quantities of ground flat stock for prototype or replacement tooling.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eAISI Type O1 oil-hardening tool steel — machines cleanly in the annealed state and hardens with an oil quench\u003c\/li\u003e\n\u003cli\u003eGround flat stock with tight thickness tolerance of plus or minus 0.001 inches for close-tolerance tooling applications\u003c\/li\u003e\n\u003cli\u003eWidth tolerance of 0.000 to minus 0.005 inches ensures predictable material removal during finish grinding\u003c\/li\u003e\n\u003cli\u003eLength tolerance of plus 0.250 inches, minus 0 inches — stock is never shorter than the nominal 18 inches\u003c\/li\u003e\n\u003cli\u003eEdge squareness held to 0.003 inches per inch across all edges\u003c\/li\u003e\n\u003cli\u003eWeighs 4.78 pounds — appropriate for manual handling and standard milling or surface-grinding setups\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a general-purpose O1 oil-hardening tool steel flat stock suitable for custom toolmaking, die components, punches, and precision fixtures in any shop equipped to machine and heat-treat tool steel.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eCutting and machining of tool steel flat stock should be performed by qualified machinists or tool-and-die professionals using appropriate cutting fluids and carbide or high-speed steel tooling. Heat treatment to final hardness requires controlled furnace equipment and proper oil-quench procedures — consult AISI O1 heat-treat guidelines for soak temperatures and quench media. Always allow the bar to reach ambient temperature before taking final tolerance measurements. Secure the workpiece firmly in a vise or fixture before any cutting or grinding operation.\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\/8 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 1-1\/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, 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: 4.78 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: 54176\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51539809403186,"sku":"54176","price":238.06,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6555d28ffd7e02d6cc316d25961d7428_ca54b6f9-427d-4157-a468-96dafb1a5491.jpg?v=1785844393","url":"https:\/\/voomisupply.com\/products\/starrett-54176-o1-tool-steel-flat-stock-5-8x1-1-2x18-in","provider":"Voomi Supply","version":"1.0","type":"link"}