S-92164A040 0.641" ID x 1.07" OD ASME B18.21.1 External-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance through external tooth design that bites into mating surfaces, preventing loosening under dynamic loads
• Excellent corrosion resistance from premium bronze material, ideal for harsh industrial environments and marine applications
• Optimal hardness and durability with Rockwell B60 rating, maintaining tooth integrity and locking performance through repeated use
• Precise dimensional compatibility with 5/8" fasteners, featuring 0.641" ID and 1.07" OD for perfect fit and uniform load distribution
• Reliable compliance assurance meeting ASME B18.21.1 standards for consistent quality and performance in critical applications
• Environmental responsibility with full RoHS 3 and REACH compliance, ensuring safe use across regulated industries
• Consistent thickness control between 0.042-0.050" for predictable compression and reliable locking force

Professional Applications & Engineering Value

This bronze external tooth lock washer delivers exceptional engineering value in demanding applications where vibration-induced loosening threatens assembly integrity. The bronze material provides natural corrosion resistance while maintaining sufficient hardness (Rockwell B60) to prevent deformation under load. The strategically positioned external teeth create multiple biting points that dig into both the fastener and surface, creating mechanical interference that resists rotational movement. This design proves particularly valuable in industrial machinery, marine equipment, and electrical assemblies where vibration resistance is critical. The combination of material properties and tooth configuration ensures reliable performance in temperature-variable environments where thermal cycling might compromise other locking methods, making it an optimal choice for maintenance-critical applications requiring long-term fastener security.

Specification Summary & Compliance

This 5/8" tooth lock washer features precise dimensional specifications including 0.641" inner diameter, 1.07" outer diameter, and thickness ranging 0.042-0.050". Manufactured to exacting ASME B18.21.1 standards for dimensional consistency and performance reliability. The washer is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance across global markets. The inch system measurements provide compatibility with standard imperial fastener systems while the external tooth configuration delivers consistent locking performance across various surface materials.