S-90630A204 1 1/8"-12 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through nylon insert locking mechanism that maintains secure fastening in high-motion environments
• Exceptional strength and durability with Grade 8 steel construction, capable of withstanding heavy-duty industrial applications
• Reliable high-temperature performance with nylon insert rated up to 220°F (104°C) for demanding operating conditions
• Precise thread engagement with UNF fine threading and Class 2B fit ensuring consistent, secure connections
• Easy installation and removal using standard external hex drive with familiar 1 5/8" width for common tools
• Environmental compliance assurance meeting both REACH and RoHS 3 standards for safe industrial use
• Optimized for right-hand thread systems with standard hex profile for compatibility across industrial equipment

Professional Applications & Engineering Value

This Grade 8 steel nylon insert locknut delivers critical vibration resistance in demanding industrial environments where loosening under dynamic loads poses significant safety and operational risks. The UNF fine threading provides superior thread engagement compared to coarse threads, while the nylon insert locking mechanism creates consistent friction that maintains clamp load without damaging mating threads. Engineered for heavy-duty applications in machinery, automotive, and construction equipment, this external hex locknut combines the high tensile strength of Grade 8 steel with temperature-resistant nylon that performs reliably up to 220°F. The standard hex profile ensures compatibility with common tools, streamlining maintenance procedures in industrial settings where vibration-induced fastener failure can lead to costly downtime and safety hazards.

Specification Summary & Compliance

This locknut features precision 1 1/8"-12 UNF fine threading with Class 2B thread fit for consistent engagement and reliable performance. Manufactured from high-strength Grade 8 steel with standard external hex drive (1 5/8" width) and right-hand thread direction. The nylon insert provides effective locking capability with maximum temperature rating of 220°F. The product is fully compliant with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) environmental standards, ensuring safe use across industrial applications while meeting rigorous quality and safety requirements for professional fastening solutions.