S-91120A312 2.7 mm ID x 5.5 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 thanks to 18-8 stainless steel construction for long-term reliability in harsh environments
- Precision metric sizing with 2.7mm ID and 5.5mm OD ensuring perfect fit for M2.5 fasteners in compact assemblies
- Guaranteed dimensional consistency through strict adherence to DIN 6798 manufacturing standards
- Enhanced safety compliance with RoHS 3 and REACH environmental regulations for global industrial applications
- Optimal spring action from 0.3-0.5mm thickness providing maintained tension without material fatigue
- External tooth configuration offering maximum surface contact for superior locking performance
Professional Applications & Engineering Value
These M2.5 external tooth lock washers deliver critical vibration resistance in precision assemblies where minute movements can cause catastrophic failure. The 18-8 stainless steel construction provides inherent corrosion resistance, making them ideal for electronics, instrumentation, and automotive applications exposed to moisture or chemicals. The external tooth design according to DIN 6798 ensures teeth engage both the fastener and surface simultaneously, creating a locking action that maintains clamp load in high-vibration environments. With their metric dimensions (2.7mm ID, 5.5mm OD) and thin profile, they're particularly valuable in space-constrained applications where reliable anti-loosening protection is essential for equipment longevity and safety.
Specification Summary & Compliance
Manufactured to DIN 6798 specifications with precise dimensional tolerances for consistent performance. The 18-8 stainless steel construction ensures material integrity, while compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations guarantees environmental safety. Designed specifically for M2.5 screw sizes with external tooth configuration providing reliable locking action in metric fastener systems across industrial applications.
