S-90127A132 20.5 mm ID x 44.5 mm OD Heavy-Vibration-Resistant Spring Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance prevents fastener loosening under dynamic loads and mechanical stress
• Zinc-plated steel construction provides excellent corrosion protection for extended service life in harsh environments
• Optimized dimensions (44.5mm OD, 20.5mm ID) ensure perfect fit and uniform load distribution for M20 fasteners
• Rockwell C40 hardness rating delivers exceptional durability and maintains spring tension under heavy loads
• 3.3mm thickness with 4.3mm overall height creates reliable spring action for consistent locking performance
• Full RoHS 3 & REACH compliance meets stringent environmental regulations for global industrial applications
• Heavy-duty locking capability maintains joint integrity in high-vibration machinery and equipment

Professional Applications & Engineering Value

This M20 spring lock washer addresses critical vibration-induced loosening in industrial assemblies where maintaining bolt preload is essential. The zinc-plated steel material provides dual benefits of corrosion resistance and maintained spring properties, ensuring long-term reliability in exposed or humid conditions. The specific 44.5mm outer diameter and 20.5mm inner diameter are engineered to distribute clamping force evenly while the spring lock design creates continuous tension that counters rotational forces. Ideal for heavy machinery, automotive assemblies, and construction equipment, this washer solves the common problem of joint failure in high-vibration environments, reducing maintenance frequency and improving operational safety.

Specification Summary & Compliance

Precisely manufactured to 20.5mm ID and 44.5mm OD with 3.3mm thickness and 4.3mm overall height for M20 fastener applications. The Rockwell C40 hardness ensures consistent spring performance and meets industrial standards for lock washers. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, including the latest SVHC requirements as of June 2023, making it suitable for regulated industries and international markets requiring environmental safety certifications.