S-90488A140 0.331" ID x 0.512" OD Heavy-Vibration-Resistant Spring Lock Washers for Socket Head Screws

Key Features & Benefits at a Glance

• Superior vibration resistance with dual top and bottom serrations that bite into mating surfaces, preventing fastener loosening under dynamic loads
• Excellent corrosion resistance from 18-8 stainless steel construction, ideal for harsh industrial environments and outdoor applications
• Optimized dimensional compatibility with precise M8 metric sizing (0.331" ID/0.512" OD) ensuring perfect fit with standard fastener systems
• Enhanced durability through Rockwell C42 hardness rating, maintaining spring tension and performance through repeated loading cycles
• Reliable chemical compliance meeting RoHS 3 and REACH standards for safe use in regulated industries
• Reduced maintenance requirements through corrosion-resistant stainless steel that maintains integrity in humid or chemical-exposed environments
• Secure fastening performance with spring lock design that maintains consistent clamping force despite thermal expansion or vibration

Professional Applications & Engineering Value

This M8 metric spring lock washer delivers critical vibration-resistant performance for demanding industrial applications where fastener security is paramount. Engineered with dual serration on both top and bottom surfaces, the washer creates positive locking action that prevents rotational loosening in machinery, automotive assemblies, and electrical enclosures subject to constant motion. The 18-8 stainless steel construction provides exceptional corrosion resistance, making it suitable for marine applications, food processing equipment, and chemical plants where moisture and corrosive agents are present. With Rockwell C42 hardness, the washer maintains its spring properties and clamping force through repeated compression cycles, ensuring long-term reliability in high-vibration environments. The precise metric dimensions (0.331" ID/0.512" OD) guarantee compatibility with standard M8 fasteners while the thin 0.028" profile fits space-constrained assemblies without compromising performance.

Specification Summary & Compliance

This spring lock washer features precise metric dimensions with 0.331" inner diameter, 0.512" outer diameter, and 0.028" thickness specifically designed for M8 fastener systems. Manufactured from 18-8 stainless steel with Rockwell C42 hardness, it delivers consistent mechanical performance. The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and chemical compliance for industrial applications worldwide. The dual serration pattern on both top and bottom surfaces provides enhanced locking capability according to industry standards for vibration-resistant fastening solutions.