S-90391A119 40 mm ID x 62 mm OD DIN 5406 Spring Lock Washers for Slotted Bearing Nuts

Key Features & Benefits at a Glance

• Superior vibration resistance through external tooth design that bites into mating surfaces, preventing loosening under dynamic loads
• Precise dimensional compatibility with M40 screws and chamfered bearing nuts for seamless integration into existing assemblies
• Durable steel construction provides reliable spring action and maintains locking force through repeated compression cycles
• Conical spring shape delivers consistent tension and compensation for wear in high-vibration environments
• Full regulatory compliance with RoHS 3 and REACH standards ensures environmental responsibility and global market acceptance
• Dual DIN certification (5406 & 981) guarantees manufacturing precision and interchangeability in European engineering applications
• Optimized tooth placement on external perimeter maximizes surface contact while minimizing damage to protected components

Professional Applications & Engineering Value

This M40 spring lock washer delivers critical vibration resistance in heavy-duty mechanical systems where chamfered bearing nuts require secure fastening. The external tooth configuration creates multiple biting points that dig into mating surfaces, effectively resisting rotational forces that cause conventional washers to fail. Manufactured from high-grade steel with conical spring geometry, it maintains constant tension while accommodating thermal expansion and material wear. The washer's metric dimensions (40mm ID, 62mm OD) ensure perfect alignment with M40 threaded components in industrial machinery, automotive assemblies, and construction equipment where DIN standards govern manufacturing specifications. This combination of precise engineering and regulatory compliance makes it ideal for OEMs and maintenance teams requiring dependable locking solutions that meet international environmental and safety standards.

Specification Summary & Compliance

This spring lock washer conforms to DIN 5406 for dimensional requirements and DIN 981 for chamfered bearing nut applications. Critical dimensions include 40mm inner diameter, 62mm outer diameter, 1.250mm thickness, and 4mm overall height with external tooth placement. The washer is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring restriction of hazardous substances while meeting the latest European environmental directives for industrial components.