S-90391A174 3.988" ID x 5.5" OD ANSI/ABMA 8.2 Spring Lock Washers for Slotted Bearing Nuts

Key Features & Benefits at a Glance

• Superior vibration resistance through conical spring design that maintains constant tension under dynamic loads
• Enhanced locking security with external teeth that bite into mating surfaces for reliable anti-loosening performance
• Precision dimensional compatibility with 3.918"-12 screw sizes and chamfered bearing nuts for seamless integration
• Robust steel construction ensuring long-term durability and consistent performance in demanding industrial environments
• Standardized manufacturing quality compliant with ANSI/ABMA 8.2 specifications for guaranteed interchangeability
• Environmental compliance assurance meeting RoHS 3 and REACH regulations for safe use in regulated industries
• Optimized load distribution with 5.5" OD and 0.100" thickness design that minimizes surface damage while maximizing clamping force

Professional Applications & Engineering Value

This spring lock washer delivers exceptional engineering value in applications where vibration resistance is critical. The conical shape and external teeth work synergistically to create a reliable locking mechanism that prevents fastener loosening in heavy machinery, automotive assemblies, and industrial equipment. Manufactured from high-grade steel, this washer maintains its spring properties under continuous stress cycles, addressing the common industrial challenge of joint failure due to dynamic loading. The precise dimensional specifications, including the 3.988" ID and 5.5" OD, ensure perfect compatibility with standard 3.918"-12 screw sizes and chamfered bearing nuts, making it an ideal solution for maintenance, repair, and OEM applications requiring dependable locking performance.

Specification Summary & Compliance

This spring lock washer features precise dimensional specifications including 3.988" inner diameter, 5.5" outer diameter, and 0.100" thickness with external tooth configuration. Manufactured to meet ANSI/ABMA 8.2 standards for dimensional accuracy and performance requirements. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors. Designed specifically for use with 3.918"-12 screw sizes and chamfered bearing nut interfaces.