S-91111A147 21.2 mm ID x 30.6 mm OD DIN 7980 Split Lock Washers for Socket Head Screws

Key Features & Benefits at a Glance

• Superior vibration resistance prevents fastener loosening in high-stress applications
• 18-8 stainless steel construction provides excellent corrosion resistance for harsh environments
• Precision DIN 7980 compliance ensures consistent quality and reliable performance
• Optimized split lock design creates continuous spring tension for secure locking
• RoHS 3 and REACH compliance meets stringent environmental regulations for industrial use
• Metric M20 compatibility offers perfect fit with standard fastener systems
• Durable 4.3-4.7mm thickness maintains structural integrity under repeated loading

Professional Applications & Engineering Value

This M20 split lock washer delivers exceptional engineering value in applications where vibration-induced loosening compromises safety and performance. The 18-8 stainless steel material provides superior corrosion resistance, making it ideal for chemical processing, marine environments, and outdoor equipment. The split lock washer design creates continuous spring tension that compensates for thermal expansion and vibration, maintaining bolt preload in machinery, automotive assemblies, and structural frameworks. Manufactured to DIN 7980 standards, this metric lock washer ensures precise dimensional accuracy (21.2mm ID, 30.6mm OD) for reliable installation in industrial fastening systems where consistent performance is critical.

Specification Summary & Compliance

This split lock washer features precise metric dimensions with 21.2mm inner diameter and 30.6mm outer diameter, engineered to DIN 7980 specifications for dimensional accuracy and performance reliability. The washer is manufactured from 18-8 stainless steel and designed for M20 screw sizes. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and suitability for regulated industrial applications across multiple sectors.