S-94640A308 5/8"-18 Weld Nuts

Key Features & Benefits at a Glance

• Exceptional thread engagement with Class 2B fit ensures reliable, vibration-resistant connections in demanding environments
• Left-hand threading provides reverse-direction security for applications where standard right-hand threads might loosen under rotational forces
• 4130 alloy steel construction delivers superior strength-to-weight ratio and excellent fatigue resistance for heavy-duty applications
• Precision UNF fine threading (5/8"-18) offers finer adjustment capability and increased load distribution compared to coarse threads
• Optimized for 1-1/8" tube OD with 0.065" wall thickness ensures perfect fitment and structural integrity in tubing systems
• Full environmental compliance with RoHS 3 and REACH regulations guarantees safe use in regulated industries worldwide
• Complete 1-1/2" threading length provides maximum engagement surface for superior pull-out resistance

Professional Applications & Engineering Value

This left hand thread tube end weld nut solves critical engineering challenges in applications where counter-rotational forces threaten connection integrity. The 4130 alloy steel construction provides exceptional strength while maintaining weldability, making it ideal for structural tubing assemblies in aerospace, automotive, and heavy machinery. The UNF fine threading with Class 2B fit ensures precise alignment and eliminates play in high-vibration environments. Specifically engineered for 1-1/8" OD tubing with 0.065" wall thickness, this nut delivers reliable performance in hydraulic systems, roll cages, and frame structures where reverse-thread security is paramount. The fully threaded design allows for adjustable positioning while maintaining consistent clamping force throughout the engagement length.

Specification Summary & Compliance

This precision tube end weld nut features 5/8"-18 UNF fine threading with Class 2B thread fit per ASME B1.1 standards, ensuring consistent dimensional accuracy and reliable performance. The nut is manufactured from 4130 alloy steel with full left-hand threading across its 1-1/2" length and height. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting the latest environmental standards for industrial fasteners. The product is specifically designed for 1-1/8" tube OD applications with 0.065" wall thickness requirements.