S-90790A299 5/8"-11 Cap Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide steel coating, extending service life in harsh industrial environments
• Enhanced load distribution through extra-wide high profile design, reducing surface pressure and material stress
• Reliable thread engagement with Class 2B thread fit, ensuring consistent fastening performance and vibration resistance
• Quick installation capability using standard external hex drive tools, reducing assembly time and labor costs
• Robust coarse threading (5/8"-11 UNC) providing excellent grip strength and resistance to loosening under dynamic loads
• Comprehensive compliance with RoHS 3 and REACH regulations, meeting international environmental and safety standards
• Optimized thread depth (25/32") for maximum engagement and superior holding power in critical applications

Professional Applications & Engineering Value

This heavy-duty cap nut delivers exceptional engineering value through its black-oxide steel construction and extra-wide high profile design. The combination addresses common industrial challenges including corrosion-induced failure, vibration loosening, and surface damage during torque application. The UNC coarse thread pattern ensures rapid assembly in manufacturing lines while maintaining reliable performance in structural applications, machinery assembly, and heavy equipment. The external hex drive accommodates standard industrial tools, facilitating maintenance operations in confined spaces. Particularly valuable in automotive, construction, and industrial machinery sectors, this Class 2B thread cap nut provides a cost-effective solution for applications demanding both corrosion resistance and mechanical strength without compromising regulatory compliance.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2B thread fit tolerance for optimal engagement. Features 5/8"-11 UNC coarse threading with right-hand thread direction and external hex drive compatibility. Complies with RoHS 3 (2015/863/EU) with exemption 6(a)-I for lead as alloying element in steel and REACH (EC 1907/2006) regulations regarding substance restrictions. The nut maintains dimensional accuracy with 1 1/16" width and 1 3/16" height specifications, ensuring interchangeability and reliable performance across industrial applications.