S-95584A209 0.32" ID x 0.61" 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 to prevent loosening under dynamic loads
• Excellent corrosion resistance provided by 18-8 stainless steel construction for long service life in demanding environments
• Precise dimensional control with 0.32" ID and 0.61" OD ensuring perfect fit for 5/16" fasteners and consistent performance
• Reliable locking performance maintained through controlled thickness range of 0.028-0.034" for uniform pressure distribution
• Industry-standard compliance with ASME B18.21.1 specifications guaranteeing mechanical performance and interchangeability
• Environmental regulation compliance meeting RoHS 3 and REACH standards for safe use in regulated industries
• External tooth configuration providing maximum gripping action on the bearing surface while minimizing damage to softer materials

Professional Applications & Engineering Value

These external tooth lock washers deliver critical vibration-resistant performance in demanding industrial applications where fastener security is paramount. The 18-8 stainless steel construction provides exceptional corrosion resistance, making these lock washers ideal for machinery, automotive assemblies, and outdoor equipment exposed to harsh environments. The precisely engineered external teeth create multiple biting points that dig into both the fastener and bearing surface, effectively preventing rotational loosening caused by vibration, thermal cycling, or dynamic loads. This ASME B18.21.1 certified design ensures reliable performance in critical joints where failure could lead to equipment damage or safety hazards. The combination of material durability and mechanical locking action makes these industrial washers essential components for maintaining assembly integrity in vibration-prone applications.

Specification Summary & Compliance

Manufactured to ASME B18.21.1 standards with dimensional specifications including 0.32" internal diameter, 0.61" external diameter, and thickness range of 0.028-0.034" for 5/16" screw applications. These external tooth lock washers feature inch system measurements and comply with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring they meet current industry requirements for hazardous substance restrictions and chemical safety standards.