S-90983A251 1 1/2"-6 x 3 1/2" Coupling Nuts

Key Features & Benefits at a Glance

• Maximum load-bearing capacity with Grade 8 strength rating for heavy-duty applications requiring superior mechanical performance
• Enhanced corrosion resistance through zinc-plated steel construction, extending service life in industrial environments
• Secure and reliable connections with full UNC coarse threading and Class 2B fit, ensuring proper engagement with mating components
• Easy installation and removal using standard wrench tools thanks to the external hex drive design
• Versatile coupling capability with standard profile and right-hand threading for connecting threaded rods or studs
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for environmentally responsible manufacturing
• Optimized dimensional stability with precise 2 1/4" width and 3 1/2" length for consistent performance in assembly operations

Professional Applications & Engineering Value

This Grade 8 coupling nut delivers exceptional engineering value in demanding industrial applications where connection integrity is critical. The zinc-plated steel construction provides superior corrosion protection in harsh environments, while the 1 1/2"-6 UNC coarse thread design ensures rapid assembly and disassembly in maintenance operations. The fully threaded configuration and Class 2B thread fit guarantee precise engagement with mating components, eliminating play and vibration-induced loosening in structural frameworks, machinery assemblies, and heavy equipment. The external hex drive accommodates standard wrenching tools, facilitating installation in confined spaces where socket access may be limited. This heavy-duty fastener solves common engineering challenges in construction, manufacturing, and infrastructure projects requiring extended-length threaded connections with uncompromised strength and durability.

Specification Summary & Compliance

This coupling nut features 1 1/2"-6 UNC coarse threading with Class 2B thread fit per standard inch measurement system specifications. Manufactured from high-strength steel with zinc plating surface treatment, the fastener meets Grade 8 strength requirements for heavy-duty applications. The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring responsible manufacturing practices. Dimensions include 2 1/4" width across flats and 3 1/2" length with standard coupling nut profile and right-hand thread direction.