S-91855A103 2-56 Cap Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance from 18-8 stainless steel construction, ideal for harsh environments and extending service life.
• Reliable, vibration-resistant fastening ensured by the coarse UNC thread and Class 2B thread fit, minimizing the risk of loosening.
• Easy installation and high-torque capability provided by the external hex drive, compatible with standard tools.
• Durable, closed-end design protects threads from damage and contaminants, enhancing assembly integrity.
• Precise dimensional accuracy with a 3/16" width and height for consistent performance in tight spaces.
• Compliance with major environmental regulations including RoHS 3 and REACH, ensuring safety and global acceptance.
• Right-hand thread direction for standard, intuitive assembly in a wide range of industrial applications.

Professional Applications & Engineering Value

This 2-56 UNC cap nut is engineered to solve critical challenges in industrial assembly, where corrosion resistance and thread reliability are paramount. The 18-8 stainless steel material provides excellent durability against moisture and chemicals, reducing maintenance costs in applications like machinery, electrical enclosures, and outdoor equipment. Its coarse thread and Class 2B thread fit offer a secure, vibration-resistant connection that prevents unintentional loosening under dynamic loads. The external hex drive allows for efficient installation with common wrenches, speeding up assembly lines while the standard cap nut profile ensures a clean, finished appearance and protects internal components from debris. This nut delivers consistent performance in industrial cap nut uses, enhancing overall system longevity and safety.

Specification Summary & Compliance

This cap nut adheres to UNC coarse thread standards with a 2-56 thread size and Class 2B thread fit for precise dimensional tolerances. It is manufactured in accordance with inch measurement systems, featuring a width and height of 3/16" and a thread depth of 5/64". The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets stringent environmental and safety standards for industrial components.