{"product_id":"starrett-57190-a2-tool-steel-flat-stock-3-8-x-3-x-18-in","title":"Starrett 57190 A2 Tool Steel Flat Stock 3\/8 X 3 X 18 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe STARRETT 57190 is a precision-ground flat stock bar made from AISI A2 air-hardening tool steel. It measures 3\/8 inch thick, 3 inches wide, and 18 inches long, making it a practical blank for toolmakers, machinists, and die makers who need reliable pre-cut stock ready for further machining or heat treatment. A2 tool steel offers good wear resistance and dimensional stability after heat treatment, and its air-hardening characteristic reduces the risk of warping or cracking during hardening compared to oil-hardening grades. Thickness, width, and squareness tolerances are held to +0.010 to +0.015 inches, and length tolerance is +0.250 inch.\u003c\/p\u003e\u003cp\u003eThis flat stock is suited for fabricating punches, dies, gauges, shear blades, and general toolroom components in both job shop and production environments. The 18-inch length gives enough material to cut multiple blanks from a single piece, reducing setup time. It ships at 5.74 pounds, which is consistent with a solid A2 bar of these dimensions. Machinists, tool-and-die makers, and industrial maintenance technicians are the primary end users.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eAISI A2 air-hardening tool steel — stable, predictable hardening with minimal distortion\u003c\/li\u003e\n\u003cli\u003eThickness: 3\/8 inch with tolerance of +0.010 to +0.015 inches\u003c\/li\u003e\n\u003cli\u003eWidth: 3 inches with tolerance of +0.010 to +0.015 inches\u003c\/li\u003e\n\u003cli\u003eLength: 18 inches with tolerance of +0.250 inch\u003c\/li\u003e\n\u003cli\u003eSquareness tolerance held to +0.010 to +0.015 inches\u003c\/li\u003e\n\u003cli\u003eReady-to-machine flat bar — no rough shearing or significant stock removal required before layout\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard flat tool steel blank suitable for toolroom fabrication, die making, punch manufacture, and gauge work wherever AISI A2 air-hardening tool steel stock of this size is specified.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eCutting, grinding, and heat treating A2 tool steel should be performed by qualified machinists or tool-and-die makers following established shop safety practices. Eye protection, appropriate cutting fluids, and proper ventilation are required during machining operations. Heat treatment — including hardening and tempering — should follow the material manufacturer's recommendations for A2 tool steel and be performed in a controlled atmosphere or with appropriate anti-scaling precautions. Handle bar stock carefully to avoid edge damage that could affect layout accuracy.\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: 3\/8 inch (0.375 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 3 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: +0.250 inch\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: 5.74 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: 57190\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51541959967026,"sku":"57190","price":377.57,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/dd4885fbdd426ecb0fa6c3cc24fba2db_fcebc245-b5bf-4898-9434-d7c5b6b0b06c.jpg?v=1785888477","url":"https:\/\/voomisupply.com\/products\/starrett-57190-a2-tool-steel-flat-stock-3-8-x-3-x-18-in","provider":"Voomi Supply","version":"1.0","type":"link"}