S-94191A116 3/8"-24 Fed. Spec. FF-N-836, MS51968-9 Hex Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide steel coating, extending service life in harsh industrial environments
• Exceptional load-bearing capacity from Grade 8 strength rating, ensuring reliable performance under high-stress conditions
• Precise thread engagement with Class 2B fine UNF threading, reducing vibration loosening and improving assembly accuracy
• Standard hex profile design enables easy installation and removal with common wrench tools
• Compliance with multiple industry standards including Fed. Spec. FF-N-836 and MS51968-9, guaranteeing quality and interchangeability
• Environmental regulation compliance with RoHS 3 and REACH, meeting modern manufacturing sustainability requirements
• Optimized for inch-system applications with right-hand threading, compatible with North American industrial equipment

Professional Applications & Engineering Value

This Grade 8 black-oxide steel hex nut delivers critical performance advantages in demanding industrial settings where vibration resistance and corrosion protection are paramount. The 3/8"-24 UNF fine threading with Class 2B fit maintains clamping force under dynamic loads, preventing joint failure in machinery, automotive, and heavy equipment applications. The black-oxide surface treatment provides superior oxidation resistance compared to plain steel, while the external hex drive design ensures secure tool engagement during high-torque installation. Engineered to meet Fed. Spec. FF-N-836 and MS51968-9 standards, this fastener delivers consistent quality for maintenance, repair, and OEM assembly operations requiring reliable, high-strength threaded connections in inch-system configurations.

Specification Summary & Compliance

This hex nut features 3/8"-24 UNF fine threads with Class 2B thread fit tolerance for precise mating with corresponding male threads. Manufacturing complies with Fed. Spec. FF-N-836 and MS51968-9 specifications, ensuring dimensional accuracy and mechanical properties. The fastener is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant (including 224 SVHCs as of 06/10/2022), meeting current environmental regulations for hazardous substance restrictions.