S-91855A113 9/16"-18 Cap Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh environments and extended service life.
• Precise and reliable fit ensured by Class 2B fine threads (UNF 9/16"-18), minimizing the risk of cross-threading and providing secure fastening.
• Easy installation and removal with a standard external hex drive and 7/8" width, compatible with common wrenches for efficient maintenance.
• Enhanced durability and protection from a standard cap nut profile that seals the end of the bolt, preventing contamination and damage.
• Compliance with stringent regulations, including RoHS 3 and REACH, ensuring environmental safety and suitability for global industrial applications.
• Right-hand threading design for straightforward assembly in standard applications, reducing installation time and errors.
• Robust dimensional stability with a height of 15/16", providing consistent performance under various load conditions.

Professional Applications & Engineering Value

This 9/16"-18 UNF cap nut is engineered to address common industrial challenges such as corrosion-induced failure and inconsistent thread engagement. Crafted from 18-8 Stainless Steel, it offers excellent resistance to rust and oxidation, making it suitable for applications in marine, chemical processing, and outdoor equipment where moisture exposure is a concern. The Class 2B fine threads deliver a tighter fit compared to coarse threads, reducing vibration loosening and enhancing joint integrity in machinery, automotive assemblies, and structural frameworks. Its external hex drive and standard profile simplify installation in tight spaces, while the cap design protects bolt ends from debris. Ideal for industrial fastening that demands reliability, this nut ensures long-term performance without frequent replacements, saving on maintenance costs and downtime.

Specification Summary & Compliance

This cap nut adheres to UNF thread standards with a size of 9/16"-18 and Class 2B thread fit for precise dimensional accuracy. It features a fine thread spacing and right-hand thread direction, manufactured to consistent specifications including a width of 7/8" and height of 15/16". The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets environmental and safety standards for hazardous substance restrictions.