{"product_id":"drill-rod-tool-steels-81174328-alloy-steel-flat-stock","title":"Drill Rod Tool Steels 81174328 Alloy Steel Flat Stock","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe DRILL ROD TOOL STEELS 81174328 is a pre hardened alloy steel flat stock bar cut to 18 inches long, 1.5 inches wide, and 0.375 inches thick. Manufactured to AISI\/SAE Type 4142 specification, this chromium-molybdenum alloy steel delivers high toughness and fatigue resistance in the pre hardened condition, making it ready for machining, tooling, and fabrication work without additional heat treating. The bar weighs 2.86 pounds. Tight dimensional tolerances are held throughout: length tolerance is +0.125 inches, width tolerance is +0.005 inches, thickness tolerance is +0.001 inches, and square tolerance is 0.003 inches. Machinists, tool and die makers, and industrial fabricators rely on this material for demanding applications.\u003c\/p\u003e\u003cp\u003eAISI 4142 pre hardened flat stock is commonly used in machine shops, maintenance and repair operations, and industrial fabrication environments. Typical applications include fixture components, machine parts, jigs, dies, tool holders, and structural members where elevated strength and wear resistance are required. The pre hardened condition eliminates the need for an additional hardening step after rough machining, saving time in production workflows. This flat bar is suited for both prototype and production use across general industrial and heavy equipment applications.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eAISI\/SAE Type 4142 chromium-molybdenum alloy steel for high toughness and fatigue resistance\u003c\/li\u003e\n\u003cli\u003ePre hardened condition  -  ready to machine without additional heat treatment\u003c\/li\u003e\n\u003cli\u003eTight width tolerance of +0.005 inches for consistent fit in tooling applications\u003c\/li\u003e\n\u003cli\u003eThickness tolerance held to +0.001 inches for precise stock removal planning\u003c\/li\u003e\n\u003cli\u003eSquare tolerance of 0.003 inches ensures reliable seating in fixtures and vises\u003c\/li\u003e\n\u003cli\u003eSingle-piece quantity available  -  no minimum bulk order required\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard-dimension pre hardened alloy steel flat bar suitable for general machining, tooling fabrication, and industrial maintenance applications requiring AISI\/SAE Type 4142 material specification.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eWork with standard carbide tooling when machining pre hardened 4142 alloy steel, as high-speed steel tooling may wear prematurely. Always use appropriate personal protective equipment when cutting or grinding. Consult applicable shop safety standards and engineering drawings before modifying dimensions or applying secondary heat treatment processes.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Specification\u003c\/strong\u003e: AISI\/SAE Type 4142 Alloy Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 18 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Width\u003c\/strong\u003e: 1.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Thickness\u003c\/strong\u003e: 0.375 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 2.86 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Tolerance\u003c\/strong\u003e: +0.125 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth Tolerance\u003c\/strong\u003e: +0.005 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness Tolerance\u003c\/strong\u003e: +0.001 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquare Tolerance\u003c\/strong\u003e: 0.003 inches\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: DRILL ROD TOOL STEELS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 81174328\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"DRILL ROD \u0026 TOOL STEELS","offers":[{"title":"Default Title","offer_id":51958189031730,"sku":"81174328","price":55.69,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/0bd010a1cae711f9686084786dbdb869_856031dc-8587-42b6-9ca2-199663c38528.jpg?v=1789944927","url":"https:\/\/voomisupply.com\/products\/drill-rod-tool-steels-81174328-alloy-steel-flat-stock","provider":"Voomi Supply","version":"1.0","type":"link"}