{"product_id":"value-collection-581598pr-hex-socket-cap-screw-1-2-20-unf","title":"Value Collection 581598PR Hex Socket Cap Screw 1\/2-20 Unf","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VALUE COLLECTION 581598PR is a partially threaded hex socket cap screw designed for high-strength fastening applications in mechanical, structural, and industrial assemblies. Manufactured from alloy steel with a black oxide finish, this fastener provides corrosion resistance and reduced light reflection in service environments. It features a 1\/2-20 UNF thread size, a 6-inch length under head, and a 3\/8-inch hex socket drive. The black oxide coating also helps retain lubrication applied during installation. This screw meets ASME\/ANSI B18.3 and ASTM A574 standards, making it appropriate for precision and high-load fastening work performed by mechanical contractors, millwrights, and maintenance technicians.\u003c\/p\u003e\u003cp\u003eThis cap screw is suited for use in general industrial machinery, equipment assembly, tooling fixtures, and structural components where fine thread engagement and high clamp load are required. The 1\/2-20 UNF thread pitch offers greater thread engagement and vibration resistance compared to coarse thread equivalents, making it a common choice in applications subject to dynamic loading or controlled torque requirements.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e1\/2-20 UNF fine thread for high clamp load and vibration resistance\u003c\/li\u003e\n\u003cli\u003e6-inch length under head for deep fastening applications\u003c\/li\u003e\n\u003cli\u003e3\/8-inch hex socket drive for use with standard Allen or hex bit drivers\u003c\/li\u003e\n\u003cli\u003eAlloy steel construction meets ASTM A574 high-strength requirements\u003c\/li\u003e\n\u003cli\u003eBlack oxide finish provides mild corrosion resistance and reduces galling\u003c\/li\u003e\n\u003cli\u003ePartially threaded shank for shear-load bearing and precise alignment\u003c\/li\u003e\n\u003cli\u003eMeets ASME\/ANSI B18.3 dimensional standards\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 suitable for use in machinery, fixtures, and assemblies requiring a 1\/2-20 UNF partially threaded fastener.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified mechanic or technician using a calibrated torque wrench and the appropriate 3\/8-inch hex key or bit. Clean and inspect the threaded bore before installation to ensure proper thread engagement. Apply an appropriate thread lubricant or anti-seize compound as required by the assembly specification. Never exceed the rated torque for the fastener grade or the base material being threaded into.\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: 6 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThreading\u003c\/strong\u003e: Partially 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\/8 inches\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: 0.35 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: VALUE COLLECTION\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 581598PR\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51696511385906,"sku":"581598PR","price":4760.17,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/3d6b7fb646eaeb4d062737c9049380c2.jpg?v=1788343402","url":"https:\/\/voomisupply.com\/products\/value-collection-581598pr-hex-socket-cap-screw-1-2-20-unf","provider":"Voomi Supply","version":"1.0","type":"link"}