S-90391A137 120 mm ID x 164 mm OD DIN 5406 Spring Lock Washers for Slotted Bearing Nuts

Key Features & Benefits at a Glance

• Superior vibration resistance with conical spring design that maintains constant tension under dynamic loads
• Enhanced locking security through external teeth that bite into mating surfaces for reliable anti-loosening performance
• Precision compatibility with M120 screws and DIN 981 chamfered bearing nuts for seamless industrial assembly
• Durable steel construction ensures long-term reliability in demanding mechanical applications
• Optimized dimensional accuracy with 120mm ID and 164mm OD providing perfect fit for large-scale fastening systems
• Regulatory compliance meeting both RoHS 3 and REACH environmental standards for global industrial use
• Standardized performance manufactured to DIN 5406 specifications for consistent quality and interchangeability

Professional Applications & Engineering Value

This M120 spring lock washer delivers critical vibration damping in heavy machinery, construction equipment, and industrial assemblies where constant dynamic loads threaten fastener integrity. The conical spring shape creates persistent axial pressure that compensates for settlement and thermal expansion, while the strategically positioned external teeth aggressively engage both nut and workpiece surfaces to prevent rotational slippage. Manufactured from high-grade steel and engineered to DIN 5406 standards, this washer solves the fundamental challenge of maintaining clamping force in high-vibration environments where conventional fasteners typically fail. The metric dimensions (120mm ID/164mm OD) ensure perfect compatibility with large-diameter fastening systems commonly found in structural engineering and heavy equipment manufacturing.

Specification Summary & Compliance

This spring lock washer features precise metric dimensions with 120mm internal diameter, 164mm outer diameter, 2.0mm thickness, and 8mm overall height. Manufactured to DIN 5406 specifications with external tooth configuration and conical shape design. Compatible with M120 screw sizes and DIN 981 chamfered bearing nuts. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for unrestricted use in industrial applications across regulated markets.