{"product_id":"starrett-54101-o1-tool-steel-flat-stock-5-16x5-16x18-in","title":"Starrett 54101 O1 Tool Steel Flat Stock 5\/16x5\/16x18 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe STARRETT 54101 is an O1 oil-hardening tool steel flat stock bar intended for toolmakers, machinists, and die makers who need a reliable, machinable steel blank in the annealed condition. Manufactured to AISI Type O1 specification, this flat stock measures 5\/16 inches thick by 5\/16 inches wide by 18 inches long and holds a thickness tolerance of plus or minus 0.001 inches. O1 tool steel is widely used where good machinability in the soft state and predictable through-hardening in an oil quench are required. The piece weighs approximately 0.5 pounds.\u003c\/p\u003e\u003cp\u003eThis flat stock is suited for fabricating punches, dies, gauges, cutting tools, jigs, and fixtures in job shops, tool rooms, and production machine shops. The 18-inch length provides enough material for most single-piece tooling applications. Because it ships in the annealed state, it can be machined, ground, and shaped to final form before hardening. Machinists working on precision tooling regularly stock O1 flat bar in standard cross-section sizes like this 5\/16-inch square profile for low-volume and prototype work.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eAISI Type O1 oil-hardening tool steel in the annealed condition for full machinability before heat treatment\u003c\/li\u003e\n\u003cli\u003eThickness tolerance of plus or minus 0.001 inches for close-tolerance layout work\u003c\/li\u003e\n\u003cli\u003eWidth tolerance of 0.0000 to 0.0050 inches negative from nominal\u003c\/li\u003e\n\u003cli\u003eLength tolerance of plus 0.250 inches from nominal 18 inches\u003c\/li\u003e\n\u003cli\u003eSquareness held to 0.003 inches per inch on all edges\u003c\/li\u003e\n\u003cli\u003eSingle-piece package quantity suits low-volume toolroom and prototype use\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard annealed O1 oil-hardening tool steel flat bar suitable for general toolmaking, die making, and precision machining applications where AISI Type O1 material specification is required.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eO1 tool steel flat stock is typically cut, milled, and ground by machinists or toolmakers using conventional machine shop equipment. Follow your shop's established procedures for tool steel heat treatment, including proper soak temperatures and oil quench media, when hardening the finished part. Wear appropriate personal protective equipment when cutting or grinding tool steel. Consult applicable material safety and shop safety standards before performing heat treatment 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: 0.3125 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 0.3125 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\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: 0.0000 to minus 0.005 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Tolerance\u003c\/strong\u003e: plus 0.250 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquareness\u003c\/strong\u003e: 0.003 inches per inch on all edges\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.5 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\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: 54101\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51539780763954,"sku":"54101","price":83.58,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6555d28ffd7e02d6cc316d25961d7428_9a8dbb7b-04d9-4a9d-be51-bcf7c6c65f56.jpg?v=1785844300","url":"https:\/\/voomisupply.com\/products\/starrett-54101-o1-tool-steel-flat-stock-5-16x5-16x18-in","provider":"Voomi Supply","version":"1.0","type":"link"}