S-94640A249 5/8"-18 Weld Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to 4130 alloy steel construction, ensuring long-term reliability in harsh industrial environments
• Precise left-hand thread engagement with Class 2B fine threading for secure, vibration-resistant connections in specialized applications
• Optimized tube compatibility specifically designed for 1" OD tubes with 0.065" wall thickness, providing perfect fit and maximum contact surface
• Full 1-1/2" threading height offers enhanced load distribution and superior grip strength for heavy-duty fastening requirements
• Comprehensive regulatory compliance with RoHS 3 and REACH standards, ensuring environmental safety and global market acceptance
• UNF fine thread specification delivers higher torque capacity and better sealing performance compared to coarse thread alternatives
• Tube end weld design enables permanent, high-strength attachment points for critical piping and structural applications

Professional Applications & Engineering Value

This 5/8"-18 UNF left-hand thread tube end weld nut provides critical engineering solutions for industries requiring reverse-thread security and permanent tube fastening. The 4130 alloy steel construction offers exceptional strength-to-weight ratio and corrosion resistance, making it ideal for hydraulic systems, aerospace components, and industrial machinery where standard right-hand threads could loosen under rotational forces. The Class 2B fine threading ensures precise engagement with mating components, reducing the risk of cross-threading while providing superior vibration resistance. The specialized tube end design creates reliable attachment points for 1" OD tubing systems, eliminating the need for additional fittings and reducing potential leak points in pressurized applications.

Specification Summary & Compliance

This weld nut features 5/8"-18 UNF left-hand fine threading with Class 2B thread fit tolerance, ensuring consistent engagement and reliable performance. The 1-1/2" height provides optimal thread contact length for maximum load distribution. Manufactured from 4130 alloy steel, this fastener meets stringent industrial standards and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The product is engineered specifically for 1" OD tubes with 0.065" wall thickness, delivering precise compatibility and secure fastening in demanding industrial applications.