S-94191A121 9/16"-18 Fed. Spec. FF-N-836, MS51968-18 Hex Nuts

Key Features & Benefits at a Glance

• Exceptional tensile strength with Grade 8 classification ensures reliable performance in high-stress industrial environments
• Superior corrosion resistance provided by black-oxide steel coating extends service life in demanding conditions
• Precise fine threading with 9/16"-18 UNF Class 2B fit delivers secure, vibration-resistant fastening connections
• Standard hex profile with 7/8" width enables easy installation using common wrench tools
• Regulatory compliance with Fed. Spec. FF-N-836 and MS51968-18 ensures consistent quality and interchangeability
• Environmental safety through RoHS 3 and REACH compliance meets modern manufacturing standards
• Optimized dimensions (31/64" height) provide space-efficient solutions without compromising strength

Professional Applications & Engineering Value

This Grade 8 black-oxide steel hex nut delivers exceptional engineering value in demanding industrial applications where vibration resistance and corrosion protection are critical. The 9/16"-18 UNF fine thread configuration with Class 2B fit ensures precise engagement with mating components, preventing loosening under dynamic loads while maintaining consistent clamping force. The black-oxide surface treatment provides durable protection against environmental factors, making these heavy-duty hex nuts ideal for machinery, equipment manufacturing, and structural applications requiring reliable fastening performance in challenging conditions. The external hex drive design facilitates quick installation and removal using standard tools, enhancing maintenance efficiency.

Specification Summary & Compliance

This 9/16"-18 UNF hex nut features Class 2B thread tolerance for precise fitment and complies with Fed. Spec. FF-N-836 and MS51968-18 manufacturing standards. The component meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance requirements, ensuring safe use in regulated industries. With dimensions of 7/8" width and 31/64" height, this Grade 8 strength-rated fastener delivers consistent performance across industrial applications requiring right-hand thread configuration and external hex drive compatibility.