S-90895A029 0.264" ID x 0.374" 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 to prevent loosening under dynamic loads
• Exceptional corrosion resistance thanks to 18-8 stainless steel construction, ideal for harsh industrial environments
• Enhanced durability and spring retention with Rockwell C38 hardness maintaining locking force through repeated cycles
• Dual-standard compatibility designed for both 1/4" and M6 screw sizes, eliminating metric/imperial inventory duplication
• Precision dimensional control with 0.264" ID and 0.374" OD ensuring consistent fit and reliable performance
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for global industrial applications
• Optimized load distribution through 0.028" thickness and 0.047" overall height for space-constrained assemblies

Professional Applications & Engineering Value

Engineered to solve critical vibration-induced fastener failure in demanding applications, these spring lock washers utilize dual serration technology on both top and bottom surfaces to create positive mechanical locking. The 18-8 stainless steel construction provides excellent corrosion resistance for outdoor equipment, marine applications, and chemical processing environments where moisture and corrosive elements are present. With Rockwell C38 hardness, the washer maintains its spring tension and locking capability through thermal cycling and dynamic loading conditions. The precise 0.264" ID and 0.374" OD dimensions ensure proper fitment for both 1/4" and M6 screw applications, making these washers ideal for OEM manufacturing, automotive assemblies, and heavy machinery where mixed measurement systems are common. The combination of top and bottom serrations provides double the biting surface compared to conventional single-serration designs, significantly extending maintenance intervals in vibration-prone equipment.

Specification Summary & Compliance

This spring lock washer features precise dimensional specifications including 0.264" inner diameter, 0.374" outer diameter, 0.028" thickness, and 0.047" overall height. Manufactured from 18-8 stainless steel with Rockwell C38 hardness for optimal spring performance and durability. The washer is designed for use with both 1/4" and M6 screw sizes, providing flexibility across measurement systems. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for industrial applications worldwide. The dual serration design on both top and bottom surfaces meets industry standards for vibration resistance in critical fastening applications.