{"product_id":"value-collection-581571pr-hex-socket-cap-screw-1-2-13-unc","title":"Value Collection 581571PR Hex Socket Cap Screw 1\/2-13 Unc","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VALUE COLLECTION 581571PR is a hex socket cap screw designed for high-strength fastening applications in mechanical assemblies, structural connections, and industrial equipment. It features a 1\/2-13 UNC thread, a 16-inch length under head, and a 3\/8-inch hex drive socket. The screw is partially threaded, which concentrates clamping force and reduces the risk of thread galling in thick-material joints. Machined from alloy steel and finished with a black oxide coating, it offers elevated tensile strength and moderate corrosion resistance in protected or lightly exposed environments. This fastener meets ASME\/ANSI B18.3 and ASTM A574 standards. Installers and maintenance technicians use this screw wherever a clean hex drive and reliable clamping performance are required.\u003c\/p\u003e\u003cp\u003eThis fastener is suited for heavy machinery, fabrication, maintenance, and industrial assembly work requiring a long-reach socket cap screw. The 16-inch under-head length makes it appropriate for thick-stack assemblies, custom fixtures, jigs, and structural tie-through applications. The 1\/2-13 UNC thread is a standard coarse-pitch size commonly tapped into steel, cast iron, and aluminum components. Partial threading leaves a smooth shank section for precise hole alignment and shear load transfer.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e1\/2-13 UNC coarse thread for compatibility with standard tapped holes in steel and aluminum\u003c\/li\u003e\n\u003cli\u003e16-inch length under head for deep or thick-stack fastening applications\u003c\/li\u003e\n\u003cli\u003e3\/8-inch hex drive socket for use with standard hex keys and socket drivers\u003c\/li\u003e\n\u003cli\u003ePartially threaded shank for shear load transfer and accurate hole alignment\u003c\/li\u003e\n\u003cli\u003eAlloy steel construction meets ASTM A574 high-strength fastener requirements\u003c\/li\u003e\n\u003cli\u003eBlack oxide finish provides moderate corrosion resistance and reduces light reflection in service\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard ASME\/ANSI B18.3 hex socket cap screw for use in any 1\/2-13 UNC tapped hole requiring a long-reach, high-strength fastener.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis fastener is typically installed by machinists, millwrights, or maintenance technicians using a calibrated hex key or socket driver sized to 3\/8 inch. Confirm the mating tapped hole depth and thread engagement meet ASME standards before installation. Apply an appropriate thread lubricant or anti-seize compound when joining dissimilar metals or in applications subject to temperature cycling. Always de-energize, depressurize, or lock out equipment before accessing fastened assemblies in service.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/2-13 UNC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Under Head\u003c\/strong\u003e: 16 inches\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\/8 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThreading\u003c\/strong\u003e: Partially Threaded\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Alloy Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Black Oxide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFastener Standard\u003c\/strong\u003e: ASME\/ANSI B18.3, ASTM A574\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 8 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\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: 581571PR\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51706548027698,"sku":"581571PR","price":3440.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/ce598675a7ad5453d12f20213f367277.jpg?v=1788435332","url":"https:\/\/voomisupply.com\/products\/value-collection-581571pr-hex-socket-cap-screw-1-2-13-unc","provider":"Voomi Supply","version":"1.0","type":"link"}