{"product_id":"starrett-57539-a2-tool-steel-flat-stock-0-75x1-25x18-in","title":"Starrett 57539 A2 Tool Steel Flat Stock 0.75x1.25x18 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe STARRETT 57539 is an A2 air-hardening tool steel flat stock bar intended for toolmakers, machinists, and die makers who need precise, ready-to-use stock for jigs, fixtures, punches, dies, and gauges. Measuring 0.75 inches thick by 1.25 inches wide by 18 inches long, this flat stock is held to tight dimensional tolerances, including a thickness tolerance of plus or minus 0.001 inches and a square tolerance of plus or minus 0.001 inches. A2 tool steel responds well to air-hardening heat treatment, offering good wear resistance and dimensional stability after hardening, making it a dependable choice for precision tooling applications in both shop and production environments.\u003c\/p\u003e\u003cp\u003eThis flat stock is suited for machine shops, tool-and-die operations, and maintenance departments that fabricate or replace precision components. It ships in the annealed condition, ready for machining before heat treatment. Typical uses include blanks for cutting tools, punches, custom gauges, and wear plates where tight tolerances and consistent material properties are required. The 18-inch length provides enough material to machine multiple shorter components from a single piece.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eA2 air-hardening tool steel construction for good wear resistance and dimensional stability after heat treat\u003c\/li\u003e\n\u003cli\u003eThickness tolerance of plus or minus 0.001 inches for precise fit in close-tolerance applications\u003c\/li\u003e\n\u003cli\u003eSquare tolerance of plus or minus 0.001 inches ensures consistent cross-section geometry\u003c\/li\u003e\n\u003cli\u003eWidth tolerance of plus 0.000 to minus 0.005 inches for predictable stock removal during machining\u003c\/li\u003e\n\u003cli\u003eLength tolerance of plus 0.250 inches allows sufficient facing stock on each end\u003c\/li\u003e\n\u003cli\u003eSingle-piece minimum order quantity for low-volume and prototype work\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard A2 tool steel flat stock blank suitable for general toolmaking, die making, and precision machining applications where AISI A2 air-hardening tool steel material is specified.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eMachining and heat treatment of tool steel flat stock should be performed by qualified machinists or toolmakers familiar with A2 steel. Always follow appropriate shop safety practices when cutting, grinding, or heat treating tool steel. Heat treatment, including hardening and tempering, should follow the material manufacturer's published guidelines for AISI A2 tool steel. Personal protective equipment including safety glasses and heat-resistant gloves is required during any thermal processing operations.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Tool Steel, AISI A2 Air-Hardening\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e: 0.75 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 1.25 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\u003eSquare 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 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\u003eWeight\u003c\/strong\u003e: 4.8 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: 57539\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51539130384690,"sku":"57539","price":230.52,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/dd4885fbdd426ecb0fa6c3cc24fba2db_73763d58-5447-4bcd-a340-b92aa7c97b41.jpg?v=1785835086","url":"https:\/\/voomisupply.com\/products\/starrett-57539-a2-tool-steel-flat-stock-0-75x1-25x18-in","provider":"Voomi Supply","version":"1.0","type":"link"}