S-97093A117 12.2 mm ID x 21.1 mm OD DIN 128A Split Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance prevents fastener loosening in high-stress industrial environments
• Black-oxide steel construction provides excellent corrosion resistance and durability
• Rockwell C44 hardness rating ensures long-term performance under heavy loads
• Curved spring design maintains constant tension for reliable locking action
• Precise M12 sizing (12.2mm ID, 21.1mm OD) ensures perfect fit for standard metric fasteners
• DIN 128A compliance guarantees consistent quality and dimensional accuracy
• Environmental compliance with RoHS 3 and REACH standards for safe usage

Professional Applications & Engineering Value

This M12 split lock washer delivers exceptional engineering value through its black-oxide steel material and curved spring design that addresses critical vibration-induced loosening in industrial applications. The split lock washer type creates continuous spring tension against both the bearing surface and fastener, maintaining clamp load in machinery, automotive assemblies, and heavy equipment where dynamic loads and thermal cycling are common. The curved spring washer profile provides superior deflection characteristics compared to flat washers, ensuring reliable performance in vibration-resistant applications while the black-oxide surface treatment offers enhanced corrosion protection in demanding environments.

Specification Summary & Compliance

Manufactured to DIN 128A specifications with precise dimensions (12.2mm ID × 21.1mm OD × 2.0mm thickness, 3.4mm overall height) for M12 screw applications. Features Rockwell C44 hardness for optimal spring performance and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance standards for environmental safety and regulatory requirements.