S-91120A241 21 mm ID x 33 mm OD DIN 6798 External-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance through external teeth that bite into mating surfaces, preventing loosening under dynamic loads
• Corrosion-resistant performance with 18-8 stainless steel construction for longevity in harsh industrial environments
• Precision dimensional compatibility with 21mm ID specifically engineered for M20 screw applications
• Reliable locking action with external tooth design that provides consistent spring tension and secure fastening
• Standardized quality assurance through DIN 6798 compliance ensuring consistent performance and interchangeability
• Environmental regulation compliance meeting RoHS 3 and REACH requirements for global industrial use
• Optimized load distribution with 33mm OD providing enhanced surface contact area for better force distribution

Professional Applications & Engineering Value

This M20 external tooth lock washer delivers critical vibration-resistant fastening solutions for demanding industrial applications where mechanical vibrations and thermal cycling threaten joint integrity. Engineered from 18-8 stainless steel, the washer provides excellent corrosion resistance in chemical processing, marine, and outdoor equipment applications. The external tooth configuration ensures positive locking by digging into both the fastener head and bearing surface, creating reliable spring tension that maintains clamp load despite constant vibration. Meeting DIN 6798 specifications, this metric lock washer offers precision-engineered dimensions (21mm ID × 33mm OD) that guarantee proper fit and function with M20 fasteners in machinery assembly, automotive components, and structural frameworks where secure, long-lasting connections are essential.

Specification Summary & Compliance

This external tooth lock washer features precise metric dimensions with 21mm internal diameter, 33mm external diameter, and 1.2-1.5mm thickness, specifically designed for M20 screw applications. Manufactured in compliance with DIN 6798 standards for dimensional accuracy and performance requirements. The component is constructed from 18-8 stainless steel and fully complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for global industrial markets and restricted substance requirements.