{"product_id":"value-collection-581580ps-hex-socket-cap-screw-1-2-20-unf","title":"Value Collection 581580PS Hex Socket Cap Screw 1\/2-20 Unf","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VALUE COLLECTION 581580PS is a hex socket cap screw designed for high-strength fastening applications in mechanical assemblies, tooling fixtures, and equipment maintenance. It features a 1\/2-20 UNF thread — a fine-thread specification that provides superior holding strength and resistance to loosening under vibration. The 3\/8-inch hex drive accepts a standard hex key or Allen driver. Constructed from alloy steel with a black oxide finish, this fastener delivers corrosion resistance suitable for indoor and moderate-exposure environments. The 1-1\/8-inch length under head provides adequate thread engagement for medium-depth tapped holes.\u003c\/p\u003e\u003cp\u003eThis screw is commonly used in industrial maintenance, machine assembly, and structural fastening tasks where a recessed drive head is required to sit flush or below the workpiece surface. The fine UNF thread pitch makes it well-suited for precision applications and assemblies where controlled clamping force is important. Licensed machinists, maintenance mechanics, and field technicians routinely install this type of fastener across a wide range of equipment.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e1\/2-20 UNF fine-thread specification for superior vibration resistance and precise clamping\u003c\/li\u003e\n\u003cli\u003eFully threaded along the 1-1\/8-inch length under head for maximum thread engagement\u003c\/li\u003e\n\u003cli\u003eAlloy steel construction meets ASME\/ANSI B18.3 and ASTM A574 standards\u003c\/li\u003e\n\u003cli\u003eBlack oxide finish provides surface protection and reduces light reflection\u003c\/li\u003e\n\u003cli\u003e3\/8-inch hex drive accepts standard hex keys and socket drivers\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or standard-service hex socket cap screw for any application requiring a 1\/2-20 UNF fully threaded alloy steel socket cap screw with a 1-1\/8-inch length under head.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation requires a calibrated 3\/8-inch hex key or T-handle Allen driver. Always verify that the mating tapped hole meets the 1\/2-20 UNF specification before installation. Power down or de-energize any equipment before performing fastener service on live assemblies. Follow applicable torque specifications from the equipment manufacturer or relevant ASME guidelines for the fastener size and grade.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\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: 1-1\/8 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrive Type\u003c\/strong\u003e: Hex\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: Fully Threaded\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: 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: 0.1 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: 581580PS\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51697802936626,"sku":"581580PS","price":805.33,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/e2816fc3ea1a0de3ebbded6c00312548_b01566de-af8c-4daf-a3d6-eefa2787f5ff.jpg?v=1788354429","url":"https:\/\/voomisupply.com\/products\/value-collection-581580ps-hex-socket-cap-screw-1-2-20-unf","provider":"Voomi Supply","version":"1.0","type":"link"}