S-90895A217 0.827" ID x 1.181" OD Heavy-Vibration-Resistant Spring Lock Washers for Socket Head Screws

Key Features & Benefits at a Glance

• Superior vibration resistance through spring lock design that maintains constant tension under dynamic loads
• Enhanced grip and anti-loosening performance with dual-sided serrations on both top and bottom surfaces
• Excellent corrosion protection provided by zinc-plated steel construction for extended service life
• Reliable hardness and durability with Rockwell C38 rating ensuring consistent performance in demanding applications
• Precise dimensional compatibility with 0.827" ID and 1.181" OD designed specifically for M20 screw applications
• Environmental compliance assurance meeting RoHS 3 and REACH standards for global industrial use
• Metric system compatibility for seamless integration with international equipment and machinery

Professional Applications & Engineering Value

This M20 zinc-plated steel spring lock washer delivers critical engineering solutions for industrial applications where vibration-induced loosening poses significant reliability concerns. The dual-sided serration design on both top and bottom surfaces creates multiple biting edges that aggressively resist rotational movement, making it ideal for heavy machinery, automotive assemblies, and construction equipment. The zinc-plated steel construction provides essential corrosion resistance while maintaining the spring tension necessary for long-term fastener security. With its Rockwell C38 hardness and precise metric dimensions, this washer maintains its locking capability through repeated stress cycles, preventing costly downtime and maintenance in vibration-intensive environments where standard washers often fail.

Specification Summary & Compliance

This spring lock washer features precise dimensional specifications with 0.827" internal diameter and 1.181" outer diameter, specifically engineered for M20 screw applications. The washer maintains metric system standards and delivers consistent performance with Rockwell C38 hardness rating. Manufacturing compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring safe use across global industrial markets. The dual serration pattern on both top and bottom surfaces provides enhanced locking capability while the zinc-plated steel construction offers reliable corrosion protection for extended service life in demanding conditions.