S-90100A105 5/8"-11 Cap Nuts

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with Grade 8 strength rating for reliable performance in high-stress industrial environments.
• Superior corrosion resistance provided by zinc-plated steel coating, extending service life in demanding conditions.
• Secure fastening with precise thread engagement through Class 2B thread fit, reducing the risk of loosening under vibration.
• Easy installation and removal with external hex drive design, compatible with standard wrench tools for efficient maintenance.
• Enhanced safety and protection with standard cap nut profile that covers exposed thread ends, preventing snagging and contamination.
• Wide compatibility with 5/8"-11 UNC coarse threads, suitable for various industrial and construction assemblies.
• Environmental compliance assurance meeting RoHS 3 standards, supporting sustainable procurement practices.

Professional Applications & Engineering Value

This Grade 8 zinc-plated steel cap nut is engineered to address critical challenges in heavy-duty applications where vibration resistance, corrosion protection, and structural integrity are paramount. The UNC coarse thread design ensures rapid assembly and reliable holding power in construction machinery, industrial equipment, and structural frameworks. The external hex drive allows for high-torque installation, while the cap nut profile provides a finished appearance and prevents fluid ingress or debris accumulation in exposed thread areas. Made from high-strength steel with zinc plating, it combats rust and wear in harsh environments, making it an ideal choice for automotive, manufacturing, and infrastructure projects requiring durable fastener solutions.

Specification Summary & Compliance

This cap nut features a 5/8"-11 UNC coarse thread with Class 2B thread fit for consistent dimensional accuracy and secure mating. It complies with RoHS 3 (2015/863/EU) standards under exemption 6(a)-I for lead as an alloying element in steel. The nut meets Grade 8 strength classification, ensuring high tensile and yield strength for demanding applications. Dimensions include a width of 15/16" and height of 1", with right-hand thread direction and standard cap nut profile, manufactured to industry specifications for reliable performance.