{"product_id":"value-collection-872039pr-hex-socket-cap-screw-4-40-unc","title":"Value Collection 872039PR Hex Socket Cap Screw 4-40 Unc","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION 872039PR is a hex socket cap screw designed for precision fastening in mechanical assemblies and structural applications. Manufactured from alloy steel with a zinc-plated finish, this fastener provides corrosion resistance and mechanical strength suitable for demanding environments. It features a 4-40 UNC thread size, a length under head of 0.625 inches, and is fully threaded along its entire shank. The 3\/32-inch hex drive accepts standard hex keys and Allen wrenches for installation and removal. Installers in manufacturing, maintenance, and machine assembly rely on this size for fine-thread applications where precise torque control and vibration resistance are required.\u003c\/p\u003e\n\u003cp\u003eThis screw is suited for use in light machinery, instrumentation panels, electronic enclosures, and small mechanical assemblies requiring a 4-40 UNC fine-thread fastener. The zinc plating adds a layer of protection against oxidation in both indoor and moderate-exposure environments. The fully threaded design maximizes thread engagement along the full length of the screw, which is particularly useful in thin-material and blind-hole applications. Maintenance technicians and machine assemblers commonly specify this fastener for repair and original equipment builds alike.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e4-40 UNC thread size for fine-thread fastening applications\u003c\/li\u003e\n  \u003cli\u003eFully threaded shank maximizes thread engagement in thin materials\u003c\/li\u003e\n  \u003cli\u003eAlloy steel construction for high tensile strength\u003c\/li\u003e\n  \u003cli\u003eZinc-plated finish provides corrosion and oxidation resistance\u003c\/li\u003e\n  \u003cli\u003e3\/32-inch hex socket drive compatible with standard hex keys\u003c\/li\u003e\n  \u003cli\u003eMeets ASME B18.8 and ASTM A574 fastener standards\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or standard-use fastener for assemblies requiring a 4-40 UNC hex socket cap screw with a 5\/8-inch length under head and fully threaded shank.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed with a 3\/32-inch hex key or Allen wrench. Confirm the mating thread is clean and free of debris before driving the screw to prevent cross-threading. De-energize any electrical or mechanical equipment before replacing fasteners on active assemblies. Follow applicable ASME torque guidelines for 4-40 UNC alloy steel fasteners to avoid stripping the socket or over-stressing the thread.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 4-40 UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Under Head\u003c\/strong\u003e: 0.625 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThreading\u003c\/strong\u003e: Fully Threaded\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrive Type\u003c\/strong\u003e: Hex Socket\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrive Size\u003c\/strong\u003e: 3\/32 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Alloy Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish Coating\u003c\/strong\u003e: Zinc-Plated\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFastener Standard\u003c\/strong\u003e: ASME B18.8, ASTM A574\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.01 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMinimum Order Quantity\u003c\/strong\u003e: 100\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: VALUE COLLECTION\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 872039PR\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51689016197426,"sku":"872039PR","price":1593.03,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/ef6720c757834135ee8af4c7b0630447.jpg?v=1788253841","url":"https:\/\/voomisupply.com\/products\/value-collection-872039pr-hex-socket-cap-screw-4-40-unc","provider":"Voomi Supply","version":"1.0","type":"link"}