S-91120A130 4.3 mm ID x 8 mm OD DIN 6798 External-Tooth Lock Washers
External-Tooth Lock Washers
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Basic Information
Dimension Parameters
Material & Strength Parameters
Installation & Application Parameters
Finish & Compliance Parameters
Special Type Parameters
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Key Features & Benefits at a Glance
- Superior vibration resistance with external teeth that bite into mating surfaces to prevent loosening under dynamic loads
- Excellent corrosion resistance from 18-8 stainless steel construction, ideal for harsh industrial environments
- Precise dimensional compatibility with M4 screws (4.3mm ID, 8mm OD) ensuring perfect fit and consistent performance
- Reliable locking action through DIN 6798 compliance, guaranteeing standardized quality and interchangeability
- Environmental compliance assurance with RoHS 3 and REACH certification for global manufacturing applications
- Optimized spring performance from controlled 0.4-0.6mm thickness providing ideal tension and fatigue resistance
- External tooth design advantage offering maximum surface contact for enhanced grip without damaging soft materials
Professional Applications & Engineering Value
These M4 external tooth lock washers deliver critical vibration-resistant fastening in demanding applications where 18-8 stainless steel provides essential corrosion protection. The DIN 6798 compliant external tooth configuration creates multiple biting points that dig into both the fastener and workpiece, effectively resisting rotational forces in machinery, automotive assemblies, and electrical enclosures. Unlike standard flat washers, the precisely engineered teeth maintain constant tension even under thermal cycling and mechanical stress, preventing costly downtime from fastener failure. The metric dimensions (4.3mm ID, 8mm OD) ensure compatibility with international equipment designs while the 0.4-0.6mm thickness provides optimal spring action without compromising assembly clearance.
Specification Summary & Compliance
Manufactured to DIN 6798 specifications with external tooth configuration, these washers feature precise metric dimensions (4.3mm ID × 8mm OD × 0.4-0.6mm thickness) for M4 screw applications. The 18-8 stainless steel construction ensures consistent mechanical properties and corrosion resistance. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations confirms environmental safety for global industrial use.
