S-91034A413 5/16"-18 x 1 1/8" Coupling Nuts

Key Features & Benefits at a Glance

• Enhanced corrosion resistance thanks to the black-oxide steel finish, extending service life in demanding environments
• Superior load distribution with the fully threaded UNC coarse thread design, ensuring reliable connections under high stress
• Easy installation and removal using standard wrenches due to the external hex drive style
• Precise and secure thread engagement with Class 2B thread fit, minimizing the risk of cross-threading
• Versatile joining capability for connecting threaded rods or extending assemblies with its 1-1/8" length and standard profile
• Compliance with environmental regulations including RoHS 3 and REACH, making it suitable for global industrial supply chains
• Durable construction from high-strength steel, providing long-term reliability in mechanical applications

Professional Applications & Engineering Value

This 5/16"-18 UNC coupling nut is engineered to solve critical challenges in industrial assembly, such as securely joining threaded rods or extending connections in frameworks and machinery. The black-oxide steel material offers excellent corrosion resistance, reducing maintenance needs in humid or corrosive settings. Its fully threaded coarse UNC design ensures maximum thread engagement, distributing loads evenly to prevent failure under vibration or tension. With an external hex drive, it allows for quick installation using common tools, saving time in construction, automotive, and manufacturing applications. This nut is ideal for scenarios requiring robust, reusable fasteners that maintain integrity in heavy-duty use.

Specification Summary & Compliance

This coupling nut adheres to UNC coarse thread standards with a Class 2B thread fit for precise dimensional accuracy, ensuring compatibility with standard 5/16"-18 threaded components. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, confirming it is free from hazardous substances and suitable for various industrial and commercial applications. Manufactured with a standard profile and right-hand threading, it supports reliable performance in mechanical systems.