S-96177A230 5/16"-24 x 1" ASTM A276 Coupling Nuts

Key Features & Benefits at a Glance

• Exceptional corrosion resistance from the black-oxide steel finish, extending service life in demanding environments.
• Precise and reliable connections ensured by the Class 2B thread fit, minimizing the risk of cross-threading and assembly issues.
• Superior tensile strength and durability from ASTM A276 compliant steel, providing dependable performance in high-strength applications.
• Optimized for fine-thread adjustments with the 5/16"-24 UNF thread, offering greater precision and vibration resistance compared to coarse threads.
• Full threading for maximum engagement along the entire 1" length, allowing for versatile and secure fastening in various material thicknesses.
• Compliance with major environmental regulations including RoHS 3 and REACH, ensuring safety and suitability for global markets.
• Standard right-hand threading for easy and intuitive installation with common tools, streamlining the assembly process.

Professional Applications & Engineering Value

This black-oxide steel coupling nut is engineered to solve critical challenges in high-strength coupling applications where reliability is non-negotiable. The fully threaded design and Class 2B UNF fine thread provide a precise fit that resists loosening under vibration, a common failure point in machinery and structural assemblies. Manufactured to ASTM A276, it delivers consistent mechanical properties, ensuring that every nut meets the required strength for demanding uses such as connecting long threaded rods, precision equipment framing, or extending shafts. The black-oxide surface treatment adds a layer of corrosion resistance without significantly altering dimensions, making it ideal for applications exposed to moisture or harsh industrial atmospheres. By integrating these features, this coupling nut reduces maintenance needs and enhances the longevity of the overall assembly, providing clear engineering value in sectors like automotive, manufacturing, and heavy equipment.

Specification Summary & Compliance

This coupling nut adheres to precise dimensional standards, featuring a 5/16"-24 UNF fine thread with a Class 2B thread fit for consistent, reliable engagement. The external diameter is 27/64" with a total length of 1". It is manufactured in compliance with the ASTM A276 specification for material quality and performance. Furthermore, the product is RoHS 3 (2015/863/EU) compliant under exemption 6(a) and is REACH (EC 1907/2006) compliant as of the latest substance list, ensuring it meets stringent environmental and safety regulations for industrial use.