{"product_id":"starrett-57551-a2-tool-steel-flat-stock-0-125x3-5x18-in","title":"Starrett 57551 A2 Tool Steel Flat Stock 0.125x3.5x18 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe STARRETT 57551 is an A2 air-hardening tool steel flat stock bar intended for toolmakers, machinists, and die makers who need a reliable, consistent starting blank for custom tooling, jigs, fixtures, and punches. Measuring 0.125 inches thick, 3.5 inches wide, and 18 inches long, this flat stock ships in an annealed condition, ready for machining before hardening. The A2 tool steel alloy provides good dimensional stability during heat treatment and a balanced combination of hardness and toughness after air hardening. At 2.23 pounds per piece, it is a manageable stock size for bench or machine work.\u003c\/p\u003e\u003cp\u003eThis flat stock is suited for machine shops, tool and die operations, and industrial maintenance departments producing short-run tooling components. Typical applications include forming dies, cutting tools, wear plates, and gauges where A2 material is specified. It is equally useful in production tooling environments and prototype shops where controlled heat-treat distortion is a priority. The 18-inch length provides enough material for multiple blanks depending on the finished part size.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eAISI A2 air-hardening tool steel — balanced hardness and toughness with minimal distortion during heat treatment\u003c\/li\u003e\n\u003cli\u003eThickness tolerance of +0.010 to 0.015 inches for predictable stock removal during surface grinding\u003c\/li\u003e\n\u003cli\u003eWidth tolerance of +0.010 to 0.015 inches for consistent fit in fixtures and vises\u003c\/li\u003e\n\u003cli\u003eLength tolerance of +0.25 inches allows for squaring and facing on both ends\u003c\/li\u003e\n\u003cli\u003eSquare tolerance of +0.010 to 0.015 inches supports accurate layout and machining setups\u003c\/li\u003e\n\u003cli\u003eSingle-piece minimum order quantity — no bulk commitment required\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard AISI A2 tool steel flat stock blank suitable for machining into custom tooling components wherever A2 material is specified by design or print.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eMachining and heat treatment of tool steel flat stock is performed by qualified machinists and toolmakers. Material should be machined in the annealed condition prior to hardening and tempering. Air-hardening heat treatment should follow established AISI A2 procedures or the shop heat-treat specification; do not quench in oil or water. Always use appropriate guarding and personal protective equipment when grinding or cutting tool steel stock.\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 A2 Air-Hardening\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e: 0.125 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 3.5 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: +0.010 to 0.015 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth Tolerance\u003c\/strong\u003e: +0.010 to 0.015 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Tolerance\u003c\/strong\u003e: +0.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquare Tolerance\u003c\/strong\u003e: +0.010 to 0.015 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 2.23 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\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: 57551\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51540623556914,"sku":"57551","price":204.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/dd4885fbdd426ecb0fa6c3cc24fba2db_40248332-b715-4835-bab3-3db61e319ada.jpg?v=1785860339","url":"https:\/\/voomisupply.com\/products\/starrett-57551-a2-tool-steel-flat-stock-0-125x3-5x18-in","provider":"Voomi Supply","version":"1.0","type":"link"}