S-93345A038 1"-8 x 2 3/4" Coupling Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, ensuring long-term durability in harsh industrial environments
• Exceptional tensile strength from heavy-duty steel material, providing reliable performance under high-stress applications
• Accurate left-hand thread engagement with Class 2B thread fit, enabling secure connections in reverse-threading systems
• Easy installation and removal thanks to the external hex drive design and coarse UNC threading
• Full environmental compliance meeting RoHS 3 and REACH standards, making them suitable for regulated industries
• Versatile coupling capability with fully threaded design, allowing connection of two threaded rods or components
• Standardized dimensions (1 3/8" width × 2 3/4" length) ensuring compatibility with existing industrial equipment

Professional Applications & Engineering Value

This 1"-8 UNC left-hand coupling nut delivers critical engineering value in applications requiring reverse-threading security. The zinc-plated steel construction provides essential corrosion protection for outdoor equipment, marine applications, and industrial machinery exposed to moisture. The coarse UNC threading and Class 2B thread fit ensure reliable engagement in high-vibration environments where standard right-hand threads might loosen. As a fully threaded coupling nut, it enables extended rod connections in structural frameworks, conveyor systems, and mechanical assemblies. The left-hand thread direction is particularly valuable in rotating equipment where reverse threading prevents unintended disassembly, making it ideal for mixer shafts, propeller systems, and specialized machinery requiring directional thread security.

Specification Summary & Compliance

This coupling nut maintains Class 2B thread fit per UNC standards with 1"-8 coarse threading in left-hand direction. Manufacturing follows standardized dimensions: 1 3/8" width across flats and 2 3/4" length. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, containing no substances of very high concern above threshold limits. The external hex drive design and fully threaded profile adhere to industrial coupling nut specifications for reliable performance in mechanical applications.