S-99022A101 4-40 Cap Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and extending service life.
• Reliable thread engagement due to Class 2B thread fit, ensuring consistent clamping force and reducing the risk of loosening.
• Easy installation and removal with an external hex drive, compatible with standard tools for efficient assembly.
• Robust coarse UNC thread design provides faster installation and better performance in materials where fine threads might strip.
• Enhanced safety and aesthetics from the standard cap nut profile, which covers the end of the bolt to protect threads and prevent snagging.
• Compliance with environmental regulations, being RoHS 3 and REACH compliant, making them suitable for global supply chains and sensitive applications.
• Durable right-hand thread ensures compatibility with common fastener systems, offering dependable performance in repetitive use.

Professional Applications & Engineering Value

This 4-40 UNC cap nut in 18-8 stainless steel is engineered to address common industrial challenges such as corrosion, vibration loosening, and assembly efficiency. The coarse thread and Class 2B thread fit provide excellent grip in softer materials or where quick fastening is critical, reducing installation time and minimizing thread damage. Its external hex drive allows for high torque application with standard wrenches, making it ideal for machinery, automotive, and electronic enclosures that require secure, long-lasting fastening. The corrosion-resistant properties ensure reliability in outdoor or humid conditions, while the cap design adds a finished look and protects against contaminants, enhancing both functionality and safety in industrial fasteners.

Specification Summary & Compliance

This cap nut features precise UNC coarse threads with a Class 2B thread fit for consistent dimensional accuracy, measuring 1/4" in width and height with a thread depth of 5/32". It adheres to standard inch measurement systems and is manufactured from 18-8 stainless steel for durability. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring it meets strict environmental and safety regulations for use in various engineering applications.