{"product_id":"starrett-54202-o1-tool-steel-flat-stock-7-8x7-8x18-in","title":"Starrett 54202 O1 Tool Steel Flat Stock 7\/8x7\/8x18 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe STARRETT 54202 is an O1 oil-hardening tool steel flat stock bar intended for toolmakers, machinists, and die makers who need precision-ground stock ready for layout, machining, or hardening. Manufactured to AISI Type O1 specification, this flat stock measures 7\/8 inches thick by 7\/8 inches wide by 18 inches long and weighs 3.91 pounds. Thickness and squareness tolerances are held to plus or minus 0.001 inches, making it suitable for applications where dimensional accuracy is critical before and after heat treatment. O1 tool steel responds well to oil-quench hardening and is widely used for punches, dies, gauges, and cutting tools.\u003c\/p\u003e\u003cp\u003eThis flat stock is suited for machine shops, tool and die operations, and maintenance facilities that fabricate custom tooling in-house. The 18-inch length provides enough material for multiple blanks depending on the finished part size. The square cross-section and tight tolerances reduce setup time when milling or grinding to final dimensions. It is appropriate for both one-off prototype tooling and small production runs of dies or jigs.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eAISI Type O1 oil-hardening tool steel construction\u003c\/li\u003e\n\u003cli\u003eThickness and squareness tolerance held to plus or minus 0.001 inches\u003c\/li\u003e\n\u003cli\u003eWidth tolerance of 0.000 to minus 0.005 inches for consistent stock removal\u003c\/li\u003e\n\u003cli\u003eLength tolerance of plus 0.250 inches, minus 0 inches\u003c\/li\u003e\n\u003cli\u003eEdge squareness: all faces within 0.003 inches per inch\u003c\/li\u003e\n\u003cli\u003eSquare 7\/8 x 7\/8 inch cross-section minimizes rework before machining\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard O1 oil-hardening flat stock blank for use in general tool and die fabrication, gauge making, punch and die applications, and other precision machining operations requiring AISI Type O1 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 using appropriate cutting fluids and tooling rated for hardened or semi-hardened steel. Heat treatment including oil quenching should follow AISI O1 guidelines and be carried out in a controlled environment. Always allow stock to reach ambient temperature before taking final measurements to ensure dimensional accuracy.\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: 7\/8 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 7\/8 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\u003eSquareness\u003c\/strong\u003e: Edge: all 0.003 inches per inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 3.91 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: 54202\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51540593344818,"sku":"54202","price":172.79,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6555d28ffd7e02d6cc316d25961d7428_c4aec682-39d0-4304-b525-44dc327d6ae5.jpg?v=1785859445","url":"https:\/\/voomisupply.com\/products\/starrett-54202-o1-tool-steel-flat-stock-7-8x7-8x18-in","provider":"Voomi Supply","version":"1.0","type":"link"}