S-90790A216 1/2"-13 Cap Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance from black-oxide steel finish, 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 via external hex drive design, compatible with standard wrench tools for efficient assembly
• Heavy-duty construction with 1/2"-13 UNC coarse threads, providing superior strength for high-torque applications
• Regulatory compliance with REACH and RoHS 3 standards, meeting international environmental and safety requirements
• Deep thread depth (19/32") for secure fastening and improved resistance to loosening under dynamic loads

Professional Applications & Engineering Value

This black-oxide steel cap nut delivers exceptional performance in demanding industrial applications where corrosion resistance and structural integrity are paramount. The extra-wide high profile design significantly increases bearing surface area, effectively distributing clamping force and preventing surface damage to connected materials. Engineered with 1/2"-13 UNC coarse threads and Class 2B thread fit, this heavy-duty fastener maintains precise tolerances while accommodating minor variations in mating components. The external hex drive configuration ensures straightforward installation and removal using standard tools, making it ideal for machinery assembly, structural frameworks, and equipment maintenance where reliability and quick service access are critical. The combination of robust steel construction and protective black-oxide treatment provides long-term durability in environments exposed to moisture, chemicals, and temperature variations.

Specification Summary & Compliance

This cap nut features 1/2"-13 UNC coarse threads with Class 2B thread fit for consistent engagement and reliable performance. Manufacturing complies with industry standards for dimensional accuracy, including width (7/8"), height (15/16"), and thread depth (19/32"). The product is fully compliant with REACH (EC 1907/2006) regulations and RoHS 3 (2015/863/EU) with exemption 6(a)-I for lead as an alloying element in steel, ensuring environmental responsibility while maintaining mechanical properties required for industrial applications.