{"product_id":"starrett-54393-o1-tool-steel-flat-stock-5-16x3-4x36-in","title":"Starrett 54393 O1 Tool Steel Flat Stock 5\/16x3\/4x36 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe STARRETT 54393 is an O1 oil-hardening tool steel flat stock bar intended for toolmaking, die making, and precision machining applications. Manufactured to AISI Type O1 specification, this flat stock measures 5\/16 inches thick, 3\/4 inches wide, and 36 inches long, with a weight of 2.39 pounds per piece. Thickness tolerance is held to plus or minus 0.001 inches, and squareness is maintained at an edge deviation of no more than 0.003 inches per inch. These tight tolerances make it a dependable choice for fabricating punches, dies, gauges, and small tooling components that require consistent stock dimensions before heat treating.\u003c\/p\u003e\u003cp\u003eO1 tool steel is widely used in job shops, toolrooms, and maintenance departments across manufacturing environments. This flat bar form is suited for applications where stock is cut to length, profiled, and then hardened in an oil quench process to achieve the desired working hardness. Machinists and tool and die makers working in both production and prototype settings regularly specify O1 flat stock for its predictable heat-treat response and good dimensional stability. The 36-inch length allows for multiple part blanks from a single piece with minimal waste.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eAISI Type O1 oil-hardening tool steel for consistent, predictable hardening response\u003c\/li\u003e\n\u003cli\u003eThickness held to plus or minus 0.001 inches for reliable fitment in precision tooling setups\u003c\/li\u003e\n\u003cli\u003eLength tolerance of plus 0.015 inches ensures full usable length on every piece\u003c\/li\u003e\n\u003cli\u003eWidth tolerance of 0.000 to minus 0.005 inches for controlled stock sizing\u003c\/li\u003e\n\u003cli\u003eEdge squareness deviation no greater than 0.003 inches per inch across all edges\u003c\/li\u003e\n\u003cli\u003eSingle-piece packaging with a minimum order quantity of one for flexible purchasing\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard O1 oil-hardening tool steel flat bar suitable for general toolroom and die-making applications requiring AISI Type O1 material specification.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eMachining and finishing of O1 tool steel flat stock should be completed prior to heat treating. Oil quenching and tempering operations should be performed by qualified personnel following established metallurgical procedures for AISI O1 tool steel. Appropriate personal protective equipment and ventilation are required during heat-treat operations. Consult applicable shop safety standards and material data sheets before processing.\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: 3\/4 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\u003eSquareness\u003c\/strong\u003e: Edge — all 0.003 inches per inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 2.39 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: 54393\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51544476418354,"sku":"54393","price":170.61,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6555d28ffd7e02d6cc316d25961d7428_74359bc7-1f59-4379-86fd-f9011b5c43d4.jpg?v=1785927407","url":"https:\/\/voomisupply.com\/products\/starrett-54393-o1-tool-steel-flat-stock-5-16x3-4x36-in","provider":"Voomi Supply","version":"1.0","type":"link"}