{"product_id":"starrett-54417-o1-tool-steel-flat-stock-3-8x4x36-in","title":"Starrett 54417 O1 Tool Steel Flat Stock 3\/8x4x36 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe STARRETT 54417 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die making, and precision machining applications. Manufactured to AISI Type O1 specifications, this flat stock measures 3\/8 inch thick, 4 inches wide, and 36 inches long, weighing approximately 15.3 pounds. Tight dimensional tolerances — held to plus or minus 0.001 inches on thickness and squareness — make it a reliable choice when close stock removal is required before hardening. Licensed machinists, tool and die makers, and metalworking professionals use this stock as a starting material for punches, dies, gauges, and custom tooling components.\u003c\/p\u003e\u003cp\u003eO1 tool steel is a general-purpose oil-hardening grade well suited to low- to medium-production tooling where dimensional stability after heat treat is important. This flat bar is appropriate for shop environments producing jigs, fixtures, and cutting tools. At 36 inches in length, a single bar provides enough stock for multiple short blanks or one full-length workpiece without additional splicing or welding. The 4-inch width accommodates wide die plates and larger gauge blocks without requiring gang clamping of narrower pieces.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eAISI Type O1 oil-hardening tool steel for consistent hardenability and dimensional stability\u003c\/li\u003e\n\u003cli\u003eThickness tolerance held to plus or minus 0.001 inches for close-tolerance machining\u003c\/li\u003e\n\u003cli\u003eWidth tolerance of 0.000 to minus 0.005 inches for predictable stock removal\u003c\/li\u003e\n\u003cli\u003eLength tolerance of plus 0.015 inches, minus 0 inches — always at or above nominal\u003c\/li\u003e\n\u003cli\u003eEdge squareness: all edges held to 0.003 inches per inch\u003c\/li\u003e\n\u003cli\u003eShips as a single bar with no minimum order beyond one piece\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard AISI Type O1 oil-hardening tool steel flat bar for use in conventional toolmaking, die making, and precision machining applications requiring a machinable, oil-quench hardenable steel stock.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eCutting and machining of tool steel flat stock should be performed by qualified machinists using appropriate coolant and carbide or high-speed-steel tooling. Heat treatment — including austenitizing temperature, quench media, and tempering cycles — must follow established procedures for AISI O1 steel and should be performed by a qualified heat treater. Always use appropriate personal protective equipment when cutting, grinding, or handling steel bar stock. Edges as-received may be sharp; deburr before handling or measuring.\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: 4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 36 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 15.3 pounds\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, minus 0 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEdge Squareness\u003c\/strong\u003e: 0.003 inches per inch, all edges\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: 54417\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51539006652722,"sku":"54417","price":572.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6555d28ffd7e02d6cc316d25961d7428_410a87fb-5596-4cc9-b413-3493584953df.jpg?v=1785832601","url":"https:\/\/voomisupply.com\/products\/starrett-54417-o1-tool-steel-flat-stock-3-8x4x36-in","provider":"Voomi Supply","version":"1.0","type":"link"}