{"product_id":"starrett-57521-a2-tool-steel-flat-stock-3-16x7x18-in","title":"Starrett 57521 A2 Tool Steel Flat Stock 3\/16x7x18 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe STARRETT 57521 is an A2 air-hardening tool steel flat stock bar used in tool and die making, jig and fixture fabrication, and precision machining applications. It measures 3\/16 inches thick, 7 inches wide, and 18 inches long, with a weight of 6.69 pounds. Tolerances are held tight across all dimensions: thickness and squareness are held to plus or minus 0.001 inches, width to plus 0.000 minus 0.005 inches, and length to plus 0.250 inches. A2 tool steel offers excellent wear resistance and dimensional stability through the air-hardening process, making it a reliable choice for toolmakers and machinists who need consistent pre-hardened or anneal-and-harden stock.\u003c\/p\u003e\n\u003cp\u003eThis flat stock is suited for use in machine shops, tool rooms, and manufacturing environments where precision steel blanks are cut, ground, and heat-treated into punches, dies, gauges, and similar tooling components. The 7-inch width and 18-inch length provide practical stock dimensions for medium-scale tooling layouts. A2 material is commonly specified where moderate toughness combined with good wear resistance is required, and is appropriate for both light production runs and prototype tooling. Licensed machinists and toolmakers are the primary installers and fabricators of this type of stock material.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eAISI Type A2 air-hardening tool steel for consistent heat-treat response\u003c\/li\u003e\n  \u003cli\u003eTight thickness tolerance of plus or minus 0.001 inches for precision layout work\u003c\/li\u003e\n  \u003cli\u003eWidth tolerance held to plus 0.000 minus 0.005 inches\u003c\/li\u003e\n  \u003cli\u003eSquareness tolerance of plus or minus 0.001 inches\u003c\/li\u003e\n  \u003cli\u003eLength tolerance of plus 0.250 inches allows for face-off and finish grinding\u003c\/li\u003e\n  \u003cli\u003eReady-to-machine flat stock format reduces prep time in tool room applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard AISI A2 air-hardening tool steel flat stock blank suitable for general tool and die, jig, fixture, and precision machining applications requiring A2-grade material.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eCutting and machining of tool steel flat stock should be performed by qualified machinists using appropriate metalworking equipment. When heat treating A2 tool steel, follow the material manufacturer's recommended hardening and tempering cycle for the intended application. Allow the stock to reach ambient temperature before final grinding to finished dimensions. Proper eye protection, machine guarding, and workholding practices should be observed throughout all cutting and grinding operations.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\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 A2 Air-Hardening\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e: 3\/16 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 7 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: plus 0.000 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\u003eSquare Tolerance\u003c\/strong\u003e: plus or minus 0.001 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 6.69 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 31231200\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\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: 57521\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51542222143794,"sku":"57521","price":390.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/dd4885fbdd426ecb0fa6c3cc24fba2db_2ceecb45-6ae3-47bf-96a0-6de8001435dd.jpg?v=1785895573","url":"https:\/\/voomisupply.com\/products\/starrett-57521-a2-tool-steel-flat-stock-3-16x7x18-in","provider":"Voomi Supply","version":"1.0","type":"link"}