S-96982A147 20.2 mm ID x 33.6 mm OD DIN 128A Split Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance prevents fastener loosening under dynamic loads, ensuring long-term joint integrity in high-stress applications.
• Excellent corrosion protection from zinc yellow-chromate plating, extending service life in harsh or outdoor industrial environments.
• High Rockwell C44 hardness provides exceptional spring-back and durability, maintaining locking force through repeated use.
• Precision DIN 128A compliance guarantees dimensional accuracy and reliable performance in metric M20 screw assemblies.
• Optimized curved split design creates consistent axial tension, effectively compensating for settlement and thermal expansion.
• Robust steel construction offers high tensile strength for demanding mechanical and structural applications.
• Easy installation and identification with clear M20 sizing and standard yellow-chromate finish for quick assembly line integration.

Professional Applications & Engineering Value

This M20 split lock washer is engineered to solve critical loosening issues in vibrating machinery, automotive systems, and heavy equipment. The curved spring design and Rockwell C44 hardness ensure it maintains constant preload, preventing backlash in bolted connections subject to thermal cycling or impact loads. Made from zinc yellow-chromate plated steel, it resists corrosion in industrial atmospheres, reducing maintenance frequency. Complying with DIN 128A standards, this metric lock washer delivers reliable performance in European machinery exports and global M20 fastener applications, providing engineers with a certified solution for vibration-prone assemblies.

Specification Summary & Compliance

This washer meets DIN 128A specifications with precise dimensions: 20.2 mm ID, 33.6 mm OD, 3.0 mm thickness, and 5.1 mm overall height for M20 screws. Manufactured to standard metric tolerances with Rockwell C44 hardness verification. The zinc yellow-chromate plating provides corrosion resistance, and the product conforms to relevant industrial standards for material and performance, ensuring compatibility with metric fastener systems and industrial safety requirements.