S-90630A211 1 1/4"-8 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through nylon insert locking technology that maintains secure fastening even under continuous motion
• Exceptional strength and durability with Grade 8 steel construction capable of withstanding heavy loads and high-stress applications
• Reliable high-temperature performance with nylon insert maintaining locking effectiveness up to 220°F (104°C)
• Easy installation and removal with standard external hex drive design compatible with common wrench tools
• Precise thread engagement with Class 2B UNC coarse threads ensuring consistent fit and reduced cross-threading risk
• Environmental compliance assurance meeting both REACH and RoHS 3 standards for industrial safety requirements
• Optimized for industrial environments with right-hand threading conforming to standard UNC specifications

Professional Applications & Engineering Value

This Grade 8 steel nylon insert locknut delivers critical vibration resistance in demanding industrial applications where loosening under dynamic loads poses significant safety risks. The nylon insert locking mechanism creates consistent friction against mating threads, effectively dampening vibrations in machinery, heavy equipment, and structural assemblies. Engineered with UNC coarse threads and Class 2B thread fit, this fastener ensures reliable engagement in high-vibration environments while accommodating minor misalignments. The external hex drive style provides secure tool engagement for proper torque application, making it ideal for maintenance-critical applications in manufacturing, construction, and transportation equipment where vibration-resistant fastening solutions are essential for operational safety and reduced downtime.

Specification Summary & Compliance

This heavy-duty locknut features precise 1 1/4"-8 UNC coarse threads with Class 2B thread fit tolerance for optimal engagement. The fastener measures 2 1/64" across flats and 1 41/64" in height, manufactured from high-strength Grade 8 steel with a nylon insert rated for temperatures up to 220°F. Compliance includes REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) standards, ensuring environmental responsibility while meeting industrial fastener specifications for reliable performance in demanding applications.