S-91034A105 5/16"-18 x 7/8" Coupling Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide steel finish for extended service life in harsh industrial environments
• Precise Class 2B thread fit ensures smooth engagement and reliable connection integrity
• Full-threaded design provides maximum thread engagement and load distribution capabilities
• Standard UNC coarse threading (5/16"-18) enables quick assembly and disassembly operations
• External hex drive configuration offers excellent torque transmission for secure tightening
• Comprehensive compliance with RoHS 3 and REACH regulations for environmental safety
• Optimized dimensions (9/16" width × 7/8" length) balance strength with space efficiency

Professional Applications & Engineering Value

This black-oxide steel coupling nut delivers exceptional performance in demanding industrial applications where vibration resistance and long-term reliability are critical. The fully threaded UNC coarse pattern maintains consistent clamping force while accommodating minor misalignments in assembly. The external hex drive facilitates secure installation using standard wrenches, reducing assembly time in production environments. Engineered with Class 2B thread fit, this coupling nut prevents cross-threading issues while ensuring smooth mating with corresponding 5/16"-18 UNC threaded components. The black-oxide surface treatment provides enhanced corrosion protection, making it ideal for machinery, structural frameworks, and equipment requiring durable, maintenance-free threaded connections.

Specification Summary & Compliance

This coupling nut features 5/16"-18 UNC coarse threading with Class 2B thread fit for precise dimensional accuracy. Manufactured to standard coupling nut specifications with external hex drive and right-hand thread direction. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe usage across various industrial sectors. Dimensions: 9/16" width × 7/8" length.