S-94407A111 6-40 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance with a durable nylon insert that maintains locking performance in dynamic applications
• Excellent corrosion protection from Black-Oxide coated 18-8 Stainless Steel, ideal for harsh industrial environments
• Reliable high-temperature performance with nylon insert rated up to 220°F (104°C) for thermal stability
• Precise thread engagement with Class 2B thread fit ensuring consistent, secure fastening without cross-threading
• Easy installation and removal with standard external hex drive design for compatibility with common tools
• Fine thread optimization with 6-40 UNF configuration providing enhanced load distribution and adjustment precision
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for global industrial applications

Professional Applications & Engineering Value

This 6-40 UNF nylon insert locknut delivers critical vibration resistance in demanding applications where loosening under dynamic loads poses significant safety and performance risks. The Black-Oxide 18-8 Stainless Steel construction provides dual protection against corrosion and galling, while the nylon insert locking mechanism creates consistent friction that maintains clamp load without damaging mating threads. Engineered with Class 2B thread fit and UNF fine threads, it ensures precise alignment and reliable performance in precision equipment, automotive assemblies, and industrial machinery subjected to continuous vibration and thermal cycling up to 220°F.

Specification Summary & Compliance

This locknut features Class 2B thread fit per UNF standards with 6-40 fine thread specification, 5/16" width across flats, and 11/64" height. Manufactured from 18-8 Stainless Steel with Black-Oxide surface treatment and external hex drive. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material traceability for industrial procurement requirements.