{"product_id":"bowmalloy-36307-hex-head-cap-screw-1-4-28-x-1-75-in-grade-9","title":"Bowmalloy 36307 Hex Head Cap Screw 1\/4-28 X 1.75 in Grade 9","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe BOWMALLOY 36307 is a Grade 9 alloy steel hex head cap screw with a 1\/4-28 UNF thread size and a 1.75-inch length under the head. It features a zinc-plated clear chromate finish that provides corrosion resistance in typical service environments. The fastener is partially threaded, which allows the unthreaded shank to carry shear loads more effectively than a fully threaded design. It is measured in the inch system and conforms to the UNSPSC code 31161501 for inch-series fasteners. Electricians, HVAC technicians, plumbers, and mechanical contractors use hex head cap screws like this one when assembling equipment, mounting components, or securing structural members in trade installations.\u003c\/p\u003e\u003cp\u003eThis cap screw is suited for general industrial and mechanical assembly applications where high-strength fasteners are required. The 1\/4-28 fine thread pitch provides tighter thread engagement than coarse-thread alternatives, making it appropriate for use in harder materials or in applications where vibration resistance is a factor. The Grade 9 material rating indicates a high tensile-strength alloy steel construction appropriate for demanding service conditions. Partial threading makes it a common choice for bolted joints that require a close-tolerance fit between mating parts.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eGrade 9 alloy steel construction for high tensile strength\u003c\/li\u003e\n\u003cli\u003e1\/4-28 UNF fine thread for increased vibration resistance and thread engagement\u003c\/li\u003e\n\u003cli\u003e1.75-inch length under the head accommodates moderate-depth joint stacks\u003c\/li\u003e\n\u003cli\u003eZinc-plated clear chromate finish provides baseline corrosion protection\u003c\/li\u003e\n\u003cli\u003ePartially threaded shank improves shear load performance at the joint\u003c\/li\u003e\n\u003cli\u003eInch-system dimensions for direct compatibility with standard SAE tooling\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in standard 1\/4-28 UNF tapped holes in inch-series mechanical assemblies, equipment panels, and structural brackets across HVAC, electrical, plumbing, and general industrial applications.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation requires a hex-drive wrench or socket sized to the fastener head. Ensure mating threads are clean and free of debris before assembly. Verify the receiving material is rated to accept Grade 9 fastener loads to avoid thread strip-out. Follow applicable torque specifications from the equipment manufacturer or relevant industry standards for the joint material and fastener size.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/4-28 UNF\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Under Head\u003c\/strong\u003e: 1.75 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\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\u003ch4\u003eStandard Information\u003c\/h4\u003e\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: 36307\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"BOWMALLOY","offers":[{"title":"Default Title","offer_id":52010209182002,"sku":"36307","price":81.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/dda6031e2941e4c83d2fd96ad0961b39_f1380a1c-67d7-4989-9ff6-0b2fedbc7797.jpg?v=1790003754","url":"https:\/\/voomisupply.com\/products\/bowmalloy-36307-hex-head-cap-screw-1-4-28-x-1-75-in-grade-9","provider":"Voomi Supply","version":"1.0","type":"link"}