S-90630A160 1/2"-20 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through nylon insert locking mechanism that maintains secure fastening under dynamic loads
• High-temperature performance with nylon insert rated for continuous service up to 220°F (104°C)
• Exceptional strength and durability from Grade 8 steel construction, suitable for heavy-duty industrial applications
• Precise thread engagement with Class 2B fine UNF threads ensuring reliable, consistent performance
• Easy installation and removal using standard 3/4" external hex drive compatible with common tools
• Environmental compliance meeting both RoHS 3 and REACH standards for safe industrial use
• Right-hand threading compatibility with standard UNF 1/2"-20 fasteners for broad application versatility

Professional Applications & Engineering Value

This Grade 8 steel nylon insert locknut delivers critical vibration resistance in demanding industrial environments where secure fastening is paramount. The nylon insert locking mechanism creates consistent friction against mating threads, preventing loosening from machinery vibration, impact loads, and thermal cycling. The UNF fine thread configuration provides superior thread engagement compared to coarse threads, offering enhanced clamping force distribution and reduced susceptibility to vibration-induced failure. Engineered with Class 2B thread fit, this locknut ensures precise compatibility with standard UNF bolts while maintaining the high strength requirements of Grade 8 certification. Ideal for automotive assemblies, heavy machinery, industrial equipment, and aerospace applications where reliability under stress cannot be compromised.

Specification Summary & Compliance

This locknut features 1/2"-20 UNF fine threads with Class 2B thread fit per unified thread standards, ensuring precise dimensional accuracy and reliable performance. Manufactured from high-strength Grade 8 steel with standard external hex drive (3/4" across flats) and right-hand threading. The nylon insert provides effective locking action up to 220°F maximum temperature. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, including the latest SVHC requirements as of June 2022, ensures environmental responsibility and workplace safety.