S-94191A122 5/8"-11 Fed. Spec. FF-N-836, MS51967-21 Hex Nuts

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with Grade 8 strength rating, ensuring reliable performance in high-stress industrial applications
• Superior corrosion resistance through black-oxide steel construction, extending service life in demanding environments
• Precision coarse threading (5/8"-11 UNC) with Class 2B fit for smooth installation and secure fastening connections
• Standard hex profile design allows for easy installation and removal using common wrench tools
• Compliance with multiple specifications including Fed. Spec. FF-N-836 and MS51967-21, guaranteeing quality and interchangeability
• Environmental regulation compliance with RoHS 3 and REACH standards, ensuring safe use across various industries
• Optimized dimensions (15/16" width, 35/64" height) providing balanced strength-to-size ratio for space-conscious applications

Professional Applications & Engineering Value

This Grade 8 hex nut delivers exceptional engineering value through its black-oxide steel composition and UNC coarse thread design, specifically engineered to address common industrial fastening challenges. The 5/8"-11 thread size with Class 2B fit ensures reliable engagement and vibration resistance in heavy machinery, construction equipment, and structural applications. The external hex drive configuration provides superior torque transmission during installation, while the black-oxide surface treatment offers enhanced corrosion protection in environments exposed to moisture and chemicals. These industrial fasteners are particularly valuable in applications requiring repeated disassembly and reassembly, where coarse threading prevents cross-threading and ensures consistent performance over multiple cycles.

Specification Summary & Compliance

This heavy-duty hex nut features precise 5/8"-11 UNC coarse threading with Class 2B thread fit tolerance, manufactured to meet Fed. Spec. FF-N-836 and MS51967-21 standards. The fastener demonstrates full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors. With dimensions of 15/16" width and 35/64" height, this Grade 8 strength rated component provides reliable performance in inch-system applications requiring superior mechanical properties and dimensional accuracy.