{"product_id":"bowmalloy-36040-hex-head-cap-screw-5-16-18-x-4-in-grade-9","title":"Bowmalloy 36040 Hex Head Cap Screw 5\/16-18 X 4 in Grade 9","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe BOWMALLOY 36040 is a Grade 9 alloy steel hex head cap screw with a 5\/16-18 thread size and a 4-inch length under head. It features a zinc-plated clear chromate finish for corrosion resistance in demanding environments. The partial threading pattern provides clamping force across a range of joint thicknesses. This fastener is installed by electricians, HVAC technicians, plumbers, and general contractors wherever a high-strength inch-series hex cap screw is required.\u003c\/p\u003e\n\u003cp\u003eThis screw is suited for mechanical assemblies, equipment mounting, and structural connections in both residential and commercial applications. The 5\/16-18 coarse thread engages quickly and holds reliably in steel, aluminum, and other common base materials. Its Grade 9 rating places it above the common Grade 5 and Grade 8 classifications, making it appropriate for high-load or high-vibration installations where fastener integrity is critical.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eGrade 9 alloy steel construction for high tensile and proof-load strength\u003c\/li\u003e\n  \u003cli\u003e5\/16-18 UNC coarse thread for fast engagement and broad compatibility\u003c\/li\u003e\n  \u003cli\u003e4-inch length under head accommodates thicker joint stacks\u003c\/li\u003e\n  \u003cli\u003ePartial threading concentrates clamping force at the joint\u003c\/li\u003e\n  \u003cli\u003eZinc-plated clear chromate finish provides baseline corrosion resistance\u003c\/li\u003e\n  \u003cli\u003eInch-series dimensions per standard UNSPSC 31161501 fastener classification\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard inch-series hex head cap screw for use in any application requiring a 5\/16-18 thread and a 4-inch grip length in alloy steel construction.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstall using a standard hex wrench or socket driver sized for a 5\/16-18 cap screw head. Torque to the value specified by the equipment manufacturer or applicable structural standard for Grade 9 alloy steel fasteners. Ensure mating threads and bearing surfaces are clean and free of debris before installation. Follow all applicable codes and manufacturer guidelines for the assembly being serviced.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 5\/16-18\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Under Head\u003c\/strong\u003e: 4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSystem of Measurement\u003c\/strong\u003e: Inch\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\u003eWeight\u003c\/strong\u003e: 0.01 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 31161501\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: 36040\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"BOWMALLOY","offers":[{"title":"Default Title","offer_id":52002245050674,"sku":"36040","price":113.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/1c10b453787b361d40fc19c28275c373_e5209e95-5cc0-4971-a8ee-9a172b1d8622.jpg?v=1789997876","url":"https:\/\/voomisupply.com\/products\/bowmalloy-36040-hex-head-cap-screw-5-16-18-x-4-in-grade-9","provider":"Voomi Supply","version":"1.0","type":"link"}