S-90394A112 4.3 mm ID x 9 mm OD DIN 137B Wave Spring Lock Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from bronze material, ideal for harsh or humid industrial environments.
• Reliable spring force performance ensures consistent tension and vibration resistance in M4 screw assemblies.
• Precision metric dimensions (4.3mm ID x 9mm OD x 0.5mm thickness) for exact fit and ease of installation.
• DIN 137B compliance guarantees standardized quality and interchangeability in European machinery applications.
• RoHS 3 and REACH compliance ensures environmental safety and regulatory adherence for global supply chains.
• Wave design provides optimal elasticity and load distribution, reducing loosening under dynamic conditions.
• Lightweight and durable construction offers long service life without adding significant weight to assemblies.

Professional Applications & Engineering Value

This M4 bronze wave washer is engineered to address common industrial challenges such as vibration-induced loosening and corrosion in demanding applications. Made from bronze, it excels in environments where moisture, chemicals, or temperature variations are present, preventing rust and maintaining integrity. The wave form structure delivers consistent spring action, compensating for thermal expansion and wear in assemblies like automotive components, electrical enclosures, and precision machinery. By adhering to DIN 137B standards and offering metric sizing, it ensures reliable performance in European-engineered systems, reducing maintenance downtime and enhancing safety in vibration-resistant setups. Its compliance with RoHS and REACH further supports sustainable manufacturing practices.

Specification Summary & Compliance

This washer features precise dimensions with an inner diameter of 4.3 mm, outer diameter of 9 mm, and thickness of 0.5 mm, designed for M4 screw sizes and manufactured to DIN 137B specifications. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for industrial use where environmental and safety standards are critical.