S-90983A207 5/16"-24 x 7/8" Coupling Nuts

Key Features & Benefits at a Glance

• Exceptional tensile strength with Grade 8 classification, ensuring reliable performance in high-stress applications and preventing premature failure
• Superior corrosion resistance through zinc-plated steel construction, extending service life in harsh industrial environments
• Precise thread engagement with UNF fine threading (5/16"-24) and Class 2B fit, providing secure connections with reduced vibration loosening
• Easy installation and removal featuring a standard external hex drive (1/2" width) for compatibility with common wrench tools
• Versatile fully threaded design allowing adjustable joining of two male-threaded components at any point along the 7/8" length
• Right-hand threading compatibility for standard assembly processes across various machinery and equipment
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for safe use in regulated industries

Professional Applications & Engineering Value

This Grade 8 coupling nut delivers critical engineering solutions for heavy-duty industrial applications where connection integrity is paramount. The zinc-plated steel construction provides essential corrosion protection for equipment exposed to moisture, chemicals, or outdoor elements, while the UNF fine thread configuration (5/16"-24) offers superior resistance to vibrational loosening compared to coarse threads. The fully threaded design enables precise adjustment of connected components in automotive assemblies, machinery frames, and structural frameworks. With its external hex drive profile, maintenance personnel can achieve proper torque values using standard tools, reducing installation time and ensuring consistent clamping force across critical joints.

Specification Summary & Compliance

This coupling nut maintains Class 2B thread fit tolerances per UNF standards, ensuring consistent threading compatibility. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming absence of restricted substances. The Grade 8 strength rating corresponds to approximately 150,000 psi minimum tensile strength, while dimensional specifications include 5/16"-24 thread size, 1/2" width across flats, and 7/8" length for standardized integration into industrial fastener systems.