S-91034A100 1/4"-20 x 5/8" Coupling Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide steel construction, extending service life in harsh industrial environments
• Maximum thread engagement through fully threaded design, ensuring reliable connections between mating components
• Easy installation and removal with external hex drive, allowing standard wrench access for efficient assembly
• Precise thread compatibility with Class 2B UNC coarse threading, providing secure fastening with standard 1/4"-20 threaded rods
• Optimized strength-to-weight ratio with 1/2" width and 5/8" length dimensions, delivering robust performance in compact assemblies
• Environmental compliance assurance meeting RoHS 3 and REACH standards, suitable for regulated industrial applications
• Right-hand thread direction for standard clockwise tightening, compatible with conventional assembly procedures

Professional Applications & Engineering Value

This black-oxide steel coupling nut solves critical alignment and extension challenges in industrial assemblies where corrosion resistance and thread reliability are paramount. The 1/4"-20 UNC coarse threading with Class 2B tolerance ensures consistent engagement with mating components while the fully threaded design provides maximum contact surface for enhanced load distribution. Engineered for heavy-duty applications including machinery extensions, structural frameworks, and equipment manufacturing, the external hex drive enables quick installation in confined spaces. The standard coupling nut profile maintains compatibility with existing inch-system assemblies, making it ideal for maintenance, repair, and OEM operations requiring dependable threaded connections in demanding environments.

Specification Summary & Compliance

This coupling nut features 1/4"-20 UNC coarse threads with Class 2B thread fit ensuring precise dimensional accuracy per inch system standards. The fully threaded right-hand design with standard profile measures 1/2" width and 5/8" length. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming adherence to current substance restriction requirements for industrial fasteners.