S-97775A511 0.448" ID x 0.76" OD ASME B18.21.1; MS35335-64 Mil. Spec. External-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance prevents fastener loosening under dynamic loads, ensuring long-term assembly integrity
• 410 stainless steel construction provides excellent corrosion resistance for demanding industrial environments
• External tooth design delivers maximum locking force by biting into both mating surfaces
• Rockwell C40 hardness rating maintains tooth integrity and locking performance under high stress conditions
• Precision dimensional compliance with ASME B18.21.1 and MS35335-64 standards guarantees proper fit for 7/16" fasteners
• Environmental regulation compliance meets RoHS 3 and REACH requirements for global industrial applications
• Optimized thickness range (0.032-0.040") ensures consistent performance while accommodating manufacturing tolerances

Professional Applications & Engineering Value

These 410 stainless steel external tooth lock washers address critical vibration-induced loosening challenges in heavy machinery, automotive assemblies, and industrial equipment. The external tooth configuration creates multiple biting points that dig into both the fastener head and base material, providing superior locking action compared to standard washers. Manufactured to ASME B18.21.1 specifications and MS35335-64 standards, these washers maintain dimensional precision for reliable performance in 7/16" fastener applications. The combination of Rockwell C40 hardness and corrosion-resistant 410 stainless steel ensures these components withstand harsh operating conditions while preventing galvanic corrosion in mixed-material assemblies, making them ideal for vibration-prone applications requiring long-term reliability.

Specification Summary & Compliance

This external tooth lock washer features precise dimensions of 0.448" ID and 0.76" OD with thickness ranging 0.032-0.040", engineered specifically for 7/16" screw applications. Manufactured in compliance with ASME B18.21.1 and MS35335-64 specifications, ensuring dimensional accuracy and performance reliability. The product meets RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) requirements, confirming environmental responsibility and regulatory acceptance for industrial use worldwide.