S-94407A118 3/8"-24 Locknuts

Key Features & Benefits at a Glance

• Vibration-resistant locking with nylon insert that maintains secure fastening under dynamic loads and prevents loosening
• Superior corrosion resistance thanks to Black-Oxide coated 18-8 Stainless Steel construction for extended service life in harsh environments
• Precision thread engagement with Class 2B fit ensuring smooth installation and reliable performance in critical assemblies
• High-temperature capability with nylon insert rated to 220°F (104°C) for stable operation in demanding thermal conditions
• Industry-standard compatibility with 3/8"-24 UNF fine threads matching common industrial components and equipment
• Easy installation and removal with standard external hex drive design compatible with common wrenching tools
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for safe use in regulated industrial applications

Professional Applications & Engineering Value

This nylon insert lock nut delivers exceptional vibration resistance in mechanical systems where constant motion threatens fastener integrity. The Black-Oxide 18-8 Stainless Steel construction provides dual protection against corrosion while maintaining structural strength, making it ideal for industrial equipment, automotive assemblies, and outdoor machinery exposed to moisture and chemicals. The UNF fine thread configuration offers superior load distribution compared to coarse threads, while the Class 2B thread fit ensures consistent clamping force without galling or cross-threading issues. With its 220°F maximum temperature rating, this fastener maintains locking performance in elevated temperature environments where plastic inserts in conventional lock nuts would fail.

Specification Summary & Compliance

This locknut features 3/8"-24 UNF fine threads with Class 2B thread fit per ASME/ANSI standards, ensuring precise dimensional accuracy and reliable engagement. The external hex drive measures 9/16" across flats with a 29/64" height for standard tool compatibility. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming adherence to environmental and safety standards for industrial components. The right-hand thread direction follows conventional installation practices for maintenance efficiency.