S-90391A169 3.177" ID x 4.375" OD ANSI/ABMA 8.2 Spring Lock Washers for Slotted Bearing Nuts

Key Features & Benefits at a Glance

• Superior vibration resistance through conical spring lock design that maintains constant tension under dynamic loads
• External tooth configuration provides maximum bite and prevents rotational loosening in high-torque applications
• Precision dimensional compatibility with 3.137"-12 screws and chamfered bearing nuts for seamless assembly integration
• Robust steel construction ensures long-term durability and reliable performance in demanding industrial environments
• ANSI/ABMA 8.2 compliance guarantees standardized quality and interchangeability across industrial applications
• Environmental regulation compliance with RoHS 3 and REACH standards for safe use in regulated industries
• Optimized conical geometry delivers consistent spring action and load distribution across the entire bearing surface

Professional Applications & Engineering Value

This spring lock washer with external tooth design addresses critical vibration-induced loosening challenges in heavy machinery, automotive assemblies, and industrial equipment. The conical shape creates continuous spring tension that compensates for material settling and thermal expansion, while the strategically positioned external teeth dig into mating surfaces to prevent rotational slippage. Manufactured from high-grade steel, this washer maintains its mechanical properties under extreme conditions, making it ideal for applications requiring reliable vibration resistance. The precise 3.177" ID and 4.375" OD dimensions ensure perfect fitment with standard 3.137"-12 screw systems and chamfered bearing nuts, reducing installation time and eliminating compatibility issues in maintenance and production environments.

Specification Summary & Compliance

This spring lock washer features inch system dimensions with 3.177" internal diameter, 4.375" outer diameter, and 0.267" overall height. The product conforms to ANSI/ABMA 8.2 specifications for dimensional accuracy and performance requirements. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental safety and chemical restriction adherence. The external tooth location and conical shape provide consistent locking action compatible with chamfered bearing nut face styles as specified in the standard.