S-94407A117 5/16"-24 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through precision-engineered nylon insert that maintains locking force under dynamic loads
• Exceptional corrosion protection with Black-Oxide coated 18-8 Stainless Steel construction for harsh industrial environments
• Reliable high-temperature performance with nylon insert rated for continuous operation up to 220°F
• Precise thread engagement with Class 2B thread fit ensuring consistent clamping force and reduced cross-threading risk
• Easy installation and removal using standard wrench tools thanks to the external hex drive design
• Fine thread advantage with UNF 5/16"-24 specification providing better tension control in critical applications
• Global compliance assurance meeting RoHS 3 and REACH environmental standards for international projects

Professional Applications & Engineering Value

This nylon insert locknut delivers critical vibration resistance in demanding applications where loosening under dynamic loads poses safety risks. The Black-Oxide 18-8 Stainless Steel construction provides dual protection against corrosion while maintaining structural integrity in moist or chemically aggressive environments. The UNF fine threading (5/16"-24) offers superior tension control compared to coarse threads, making it ideal for precision equipment, automotive assemblies, and machinery where minute adjustments matter. The nylon insert creates consistent friction along the entire thread length, distributing wear evenly and extending service life. With temperature resistance up to 220°F, this fastener maintains locking performance in engine compartments, industrial ovens, and other thermally challenging applications without compromising the nylon's locking properties.

Specification Summary & Compliance

This locknut features Class 2B thread fit per UNF standards, ensuring precise dimensional accuracy and reliable mating with Class 2A external threads. The external hex drive (1/2" width) accommodates standard wrenching tools while the 11/32" height provides optimal strength-to-weight ratio. Manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, containing no substances of very high concern above threshold limits. The right-hand thread direction follows industry standards for straightforward installation in most mechanical systems.