{"product_id":"value-collection-581594pr-hex-socket-cap-screw-1-2-20-unf","title":"Value Collection 581594PR Hex Socket Cap Screw 1\/2-20 Unf","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VALUE COLLECTION 581594PR is a hex socket cap screw designed for high-strength fastening in mechanical assemblies, tooling fixtures, and industrial equipment. It features a 1\/2-20 UNF thread and measures 5 inches in length under the head. The screw is partially threaded, manufactured from alloy steel, and finished with a black oxide coating that provides moderate corrosion resistance and reduces light reflection. This fastener meets ASME\/ANSI B18.3 and ASTM A574 standards, confirming it is rated for high-tensile applications. Machinists, maintenance mechanics, and industrial technicians typically install this type of screw.\u003c\/p\u003e\u003cp\u003eThis socket cap screw is suited for use in precision machine components, jigs, dies, and structural assemblies where a flush or recessed fastener profile is required. The 1\/2-20 UNF fine thread provides strong clamping force and is well-suited for applications that require precise torque control or frequent disassembly. The 3\/8 inch hex drive accepts a standard hex key or socket driver. The black oxide finish makes it a common choice in shop-floor and fabrication environments.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e1\/2-20 UNF fine thread for precise clamping and secure engagement\u003c\/li\u003e\n\u003cli\u003e5 inch length under head for deep-reach or thick-material fastening\u003c\/li\u003e\n\u003cli\u003ePartially threaded shank reduces stress concentration in high-load joints\u003c\/li\u003e\n\u003cli\u003eAlloy steel construction meets ASTM A574 high-tensile requirements\u003c\/li\u003e\n\u003cli\u003eBlack oxide coating provides mild corrosion resistance and low-glare finish\u003c\/li\u003e\n\u003cli\u003e3\/8 inch hex socket drive compatible with standard hex keys and socket drivers\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard-dimension replacement or new-installation socket cap screw for any application requiring a 1\/2-20 UNF partially threaded hex socket fastener conforming to ASME\/ANSI B18.3.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by machinists or maintenance mechanics using a 3\/8 inch hex key or hex bit driver. De-energize and lock out any equipment before fastener replacement or assembly work. Follow applicable torque guidance from the equipment manufacturer or a current edition of the ASME B18.3 standard. Do not use an impact driver on fine-thread socket cap screws without a torque-limiting attachment, as over-torquing can strip the UNF thread or fracture the fastener head.\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: 5 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 and ASTM A574\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.3 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: 581594PR\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51717118165298,"sku":"581594PR","price":1629.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/3b4e2a55bed86e0c6aab5f78232df51f.jpg?v=1788535971","url":"https:\/\/voomisupply.com\/products\/value-collection-581594pr-hex-socket-cap-screw-1-2-20-unf","provider":"Voomi Supply","version":"1.0","type":"link"}