S-91169A360 21.2 mm ID x 33.6 mm OD DIN 127B Split Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance prevents fastener loosening in high-stress industrial environments
• Heavy-duty galvanized steel construction provides excellent corrosion protection for extended service life
• Precision DIN 127B compliance ensures consistent performance and reliable interchangeability
• Rockwell C44 hardness rating delivers maximum locking force and spring action for secure fastening
• Optimized split lock design creates continuous tension to maintain bolt preload under dynamic conditions
• RoHS 3 compliance meets environmental regulations for safe use across various industries
• Perfect M20 screw compatibility with 21.2mm ID and 33.6mm OD ensures precise fit and optimal performance

Professional Applications & Engineering Value

This M20 galvanized steel split lock washer addresses critical vibration-induced loosening challenges in demanding industrial applications. Engineered to DIN 127B standards, the washer's split design creates continuous spring tension that compensates for settlement and thermal expansion, maintaining critical bolt preload in machinery, structural assemblies, and heavy equipment. The galvanized surface treatment provides exceptional corrosion resistance, making it ideal for outdoor applications, marine environments, and chemical processing facilities where moisture and corrosive elements are present. With its Rockwell C44 hardness, this washer delivers reliable performance in high-vibration scenarios such as automotive assemblies, conveyor systems, and power transmission equipment, ensuring long-term fastener security without compromising structural integrity.

Specification Summary & Compliance

This split lock washer features precise dimensional specifications with 21.2mm inner diameter, 33.6mm outer diameter, and 3.8-4.2mm thickness specifically designed for M20 screw applications. Manufactured in compliance with DIN 127B standards for dimensional accuracy and performance requirements. The washer meets RoHS 3 (2015/863/EU) compliance for environmental safety and features a Rockwell C44 hardness rating that ensures optimal spring performance and locking capability in industrial fastening systems.