S-90268A428 1/2"-20 x 4" Coupling Nuts

Key Features & Benefits at a Glance

• Exceptional connection strength with 4" extra long design for joining threaded rods or studs in demanding applications
• Superior corrosion resistance thanks to 18-8 stainless steel construction, ideal for harsh environments
• Precise thread engagement with 1/2"-20 UNF fine threading and Class 2B fit ensuring reliable, vibration-resistant connections
• Easy installation and removal with external hex drive design compatible with standard wrenches
• Optimized load distribution through partially threaded profile and 3/4" minimum thread length
• Regulatory compliance assurance with RoHS 3 and REACH compliance for global industrial use
• Versatile right-hand threading suitable for standard assembly processes across various industries

Professional Applications & Engineering Value

This heavy-duty extra long coupling nut delivers critical engineering solutions where extended reach and reliable connections are paramount. The 18-8 stainless steel composition provides excellent corrosion resistance for applications in chemical processing, marine environments, and outdoor installations. The 1/2"-20 UNF fine threading with Class 2B fit ensures precise alignment and maintains connection integrity under vibration and dynamic loads. The 4" length and partially threaded design allow for adjustable connections while the external hex drive facilitates quick installation in confined spaces. Ideal for structural frameworks, machinery assembly, and plumbing systems requiring corrosion-resistant fasteners with regulatory compliance.

Specification Summary & Compliance

This coupling nut features 1/2"-20 UNF fine threading with Class 2B thread fit per UNF standards, ensuring precise dimensional accuracy and reliable performance. The manufacturing complies with industry standards for extra long coupling nuts with specified dimensions: 4" length, 3/4" width, and 3/4" minimum thread length. The product is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant (including 223 SVHC as of 01/17/2022), meeting stringent environmental and safety regulations for industrial fasteners.