{"product_id":"starrett-54404-o1-tool-steel-flat-stock-5-16x6x36-in","title":"Starrett 54404 O1 Tool Steel Flat Stock 5\/16x6x36 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe STARRETT 54404 is an O1 oil-hardening tool steel flat stock bar used in precision toolmaking, die making, and machine shop applications. Measuring 5\/16 inches thick, 6 inches wide, and 36 inches long, this flat stock is manufactured to tight dimensional tolerances: plus or minus 0.001 inches on thickness, 0.000 to minus 0.005 inches on width, and plus 0.015 inches on length. Edge squareness is held to 0.003 inches per inch across all edges. At 19.13 pounds, this is a substantial piece suited for fabricating punches, dies, gauges, and tooling blanks requiring post-machining heat treatment.\u003c\/p\u003e\u003cp\u003eO1 tool steel is a general-purpose oil-hardening grade widely used across job shops, tool and die operations, and precision machining environments. This flat stock is a starting-point workpiece — machinists and toolmakers cut, mill, grind, and drill it to net shape before oil-quench hardening and tempering. The 6-inch width and 36-inch length provide ample material for multiple blanks from a single piece. It is appropriate for both prototype and production tooling work in both light industrial and heavy manufacturing settings.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eAISI Type O1 oil-hardening tool steel for excellent machinability in the annealed state and good wear resistance after hardening\u003c\/li\u003e\n\u003cli\u003eThickness held to plus or minus 0.001 inches for consistent stock removal planning\u003c\/li\u003e\n\u003cli\u003eWidth tolerance of 0.000 to minus 0.005 inches ensures the piece is never oversized on width\u003c\/li\u003e\n\u003cli\u003eEdge squareness of 0.003 inches per inch on all edges reduces setup time at the mill or surface grinder\u003c\/li\u003e\n\u003cli\u003e36-inch length yields multiple blanks from a single bar with minimal material waste\u003c\/li\u003e\n\u003cli\u003eShips as a single full-length piece with a minimum order quantity of 1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a general-purpose O1 tool steel flat stock blank for toolmaking, die making, and precision machining applications where oil-hardening tool steel is specified by drawing or process requirement.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eCutting, drilling, and grinding of O1 tool steel flat stock should be performed by a qualified machinist or toolmaker using appropriate coolant to prevent localized heat buildup. Heat treatment — annealing, hardening, and tempering — should follow AISI O1 specifications and be performed by a qualified heat treat shop or trained personnel. Always use proper personal protective equipment when cutting or grinding tool steel. Follow applicable shop safety codes for metalworking operations.\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: 6 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: 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: 19.13 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: 54404\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51544618369330,"sku":"54404","price":743.39,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6555d28ffd7e02d6cc316d25961d7428_65c5df7a-4575-4cf3-8b31-9337650d541c.jpg?v=1785931644","url":"https:\/\/voomisupply.com\/products\/starrett-54404-o1-tool-steel-flat-stock-5-16x6x36-in","provider":"Voomi Supply","version":"1.0","type":"link"}