S-90715A223 9/16"-18 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through nylon insert locking technology, preventing loosening in high-motion applications
• Exceptional corrosion resistance with 316 stainless steel construction, ideal for harsh industrial and marine environments
• Reliable high-temperature performance with nylon insert rated for continuous service up to 220°F
• Precision thread engagement with Class 2B thread fit ensuring consistent, reliable fastening in critical assemblies
• Easy installation and removal with standard external hex drive design compatible with common wrench tools
• Environmental compliance assurance meeting RoHS 3 and REACH standards for workplace safety and regulatory requirements
• Fine thread advantage with UNF 9/16"-18 threads providing better tension control and vibration resistance than coarse threads

Professional Applications & Engineering Value

This 316 stainless steel nylon insert locknut delivers critical vibration resistance in demanding industrial applications where secure fastening is paramount. The UNF fine thread configuration provides superior clamping force distribution and resistance to vibrational loosening in machinery, automotive, and aerospace assemblies. The nylon insert locking mechanism creates consistent friction against the mating bolt, maintaining torque integrity even under extreme operating conditions. With its 220°F temperature rating, this locknut performs reliably in engine compartments, industrial equipment, and processing systems where thermal cycling is common. The external hex drive and standard profile ensure compatibility with existing tooling while the corrosion-resistant 316 stainless steel construction extends service life in chemically aggressive environments, reducing maintenance frequency and replacement costs.

Specification Summary & Compliance

This locknut features 9/16"-18 UNF fine threads with Class 2B thread fit for precision engagement and consistent performance. The standard external hex drive (7/8" width) and 41/64" height provide industry-standard dimensions for straightforward integration. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring regulatory compliance for industrial applications worldwide. The right-hand thread direction and nylon insert locking mechanism meet industry specifications for vibration-resistant fastening solutions.