{"product_id":"bowmalloy-36412-hex-head-cap-screw-1-2-20-x-3-in-grade-9","title":"Bowmalloy 36412 Hex Head Cap Screw 1\/2-20 X 3 in Grade 9","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe BOWMALLOY 36412 is a Grade 9 alloy steel hex head cap screw designed for high-strength fastening applications in mechanical, structural, and industrial assemblies. It features a 1\/2-20 UNF thread size with a 3-inch length under head and a partial thread configuration, making it well-suited for clamping joints where a shank grip length is required. The zinc-plated clear chromate finish provides a baseline level of corrosion resistance for general-purpose use. This fastener is installed by millwrights, maintenance technicians, and mechanical contractors working on equipment, machinery mounts, and structural connections.\u003c\/p\u003e\n\u003cp\u003eThe 36412 is suited for demanding fastening applications that require higher proof load and tensile strength than Grade 5 or Grade 8 hardware. The 1\/2-20 fine-thread profile provides better thread engagement and resistance to loosening under vibration compared to coarse-thread equivalents. Partial threading allows the unthreaded shank to bear shear loads at the joint interface, a common requirement in precision mechanical assemblies and equipment mounting situations.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eGrade 9 alloy steel construction for high proof load and tensile strength demands\u003c\/li\u003e\n  \u003cli\u003e1\/2-20 UNF fine thread for improved vibration resistance and thread engagement\u003c\/li\u003e\n  \u003cli\u003e3-inch length under head with partial threading to support shear load at the joint\u003c\/li\u003e\n  \u003cli\u003eZinc-plated clear chromate finish for baseline corrosion protection\u003c\/li\u003e\n  \u003cli\u003eHex head drive for standard hex socket or open-end wrench installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard UNF hex head cap screw for use in any application requiring a 1\/2-20 x 3-inch Grade 9 alloy steel fastener with a zinc-plated clear chromate finish.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstall with a calibrated torque wrench to the torque specification appropriate for Grade 9 1\/2-20 fasteners per the applicable engineering or equipment service documentation. Ensure mating threads are clean and free of debris before installation. Do not use an impact driver at full torque without a torque-limiting setting, as over-torquing can damage the fastener or mating material. Follow applicable ASME or equipment OEM standards for fastener installation procedures.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/2-20 UNF\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Under Head\u003c\/strong\u003e: 3 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Alloy Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: 9\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish Coating\u003c\/strong\u003e: Clear Zinc Chromate\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThreading\u003c\/strong\u003e: Partially Threaded\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSystem of Measurement\u003c\/strong\u003e: Inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 31161501\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.01 pounds\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: BOWMALLOY\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 36412\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"BOWMALLOY","offers":[{"title":"Default Title","offer_id":52084174553394,"sku":"36412","price":83.48,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6eef8092fbc51671c5d3cbf6cfcbaadc_80000643-a9b7-4542-9f03-f929a8c7792f.jpg?v=1790058058","url":"https:\/\/voomisupply.com\/products\/bowmalloy-36412-hex-head-cap-screw-1-2-20-x-3-in-grade-9","provider":"Voomi Supply","version":"1.0","type":"link"}