S-90391A111 10 mm ID x 21 mm OD DIN 5406 Spring Lock Washers for Slotted Bearing Nuts

Key Features & Benefits at a Glance

• Superior vibration resistance through conical spring design that maintains constant tension under dynamic loads
• Positive locking action with external teeth that bite into mating surfaces for secure fastening
• Chamfered nut compatibility specifically engineered for DIN 981 bearing nuts, ensuring perfect fit and load distribution
• Precision metric dimensions (10mm ID, 21mm OD) providing exact fit for M10 screw applications
• DIN 5406 compliance guaranteeing consistent quality, dimensional accuracy, and reliable performance
• Environmental compliance with RoHS 3 and REACH regulations for safe use in regulated industries
• Durable steel construction offering excellent strength and corrosion resistance for long service life

Professional Applications & Engineering Value

This M10 spring lock washer delivers critical vibration resistance in demanding industrial environments where constant tension and reliable locking are essential. The conical spring shape and external tooth configuration work synergistically to prevent loosening under cyclic loading, making it ideal for machinery, automotive assemblies, and heavy equipment applications. Engineered to DIN 5406 standards, this steel washer maintains its spring properties through repeated compression cycles, while the chamfered bearing nut compatibility ensures optimal surface contact and load distribution. The external tooth location provides maximum biting action without damaging the screw threads, preserving fastener integrity in critical industrial applications where safety and reliability are paramount.

Specification Summary & Compliance

This spring lock washer features precise metric dimensions with 10mm internal diameter and 21mm external diameter, manufactured to DIN 5406 specifications for dimensional accuracy and performance reliability. The washer is compatible with DIN 981 bearing nuts featuring chamfered face style and designed for M10 screw applications. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for regulated industrial markets. The external tooth location and conical spring shape provide the mechanical locking action specified in German industrial standards for vibration-resistant fastening systems.