S-91855A420 5/8"-11 Cap Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• Enhanced torque transmission through external hex drive design for secure tightening and reduced tool slippage
• Reliable thread engagement with Class 2B thread fit ensuring consistent performance in high-vibration applications
• Durable coarse threading (5/8"-11 UNC) providing faster assembly and reduced cross-threading risks
• Optimal protection and finish with standard cap nut profile covering exposed threads for safety and aesthetics
• Compliance with global standards including RoHS 3 and REACH for safe use in regulated industries
• Right-hand threading for standard installation compatibility across various equipment and machinery

Professional Applications & Engineering Value

This 5/8"-11 UNC cap nut delivers critical performance in demanding sectors such as heavy machinery, construction, and marine equipment, where corrosion resistance and thread reliability are paramount. The 18-8 stainless steel material combats rust and chemical exposure, extending service life in outdoor or corrosive settings. Its external hex drive allows for high-torque application with common tools, minimizing installation time while the coarse UNC thread ensures quick, secure fastening even in vibrating environments. By integrating a Class 2B thread fit, it maintains consistent clamping force, reducing maintenance needs and preventing loosening in dynamic loads.

Specification Summary & Compliance

This cap nut adheres to UNC coarse thread standards with a Class 2B thread fit for precise dimensional accuracy. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring environmental and safety standards. Dimensions include a 15/16" width, 1" height, and 5/8" thread depth, manufactured under inch measurement system specifications for consistent industrial use.