S-94640A520 5/8"-18 Weld Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance and strength from 4130 alloy steel construction for extended service life in demanding environments
• Precise, reliable thread engagement with Class 2B thread fit ensuring consistent, vibration-resistant connections
• Optimized for 1-1/8" tube systems with compatibility for 0.065" wall thickness, providing secure fluid or structural connections
• Fine UNF threading (5/8"-18) delivers higher torque capacity and better sealing compared to coarse threads
• Full 1-1/2" threading length offers maximum contact surface for stronger, more stable welded assemblies
• Right-hand fully threaded design enables straightforward installation and uniform stress distribution
• Compliance with RoHS 3 and REACH ensures environmental safety and meets global regulatory standards

Professional Applications & Engineering Value

This 5/8"-18 UNF tube end weld nut addresses critical challenges in hydraulic, pneumatic, and structural tubing systems where leak prevention and joint integrity are paramount. Manufactured from 4130 alloy steel, it provides exceptional tensile strength and fatigue resistance, making it ideal for high-pressure applications in aerospace, automotive, and heavy machinery. The Class 2B thread fit and UNF fine threading ensure precise alignment and reduce the risk of cross-threading during installation on 1-1/8" OD tubing. Its fully threaded design distributes mechanical loads evenly, minimizing stress concentrations at weld points. This nut is engineered to maintain seal integrity under vibration and thermal cycling, significantly reducing maintenance downtime in industrial fluid transfer systems.

Specification Summary & Compliance

This weld nut features 5/8"-18 UNF fine threads with Class 2B thread fit per ASME/ANSI standards, ensuring precise dimensional accuracy. It is designed for 1-1/8" tube OD with 0.065" wall thickness compatibility. The product is manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming adherence to environmental and safety standards for industrial components.