S-97775A538 0.513" ID x 0.9" OD ASME B18.21.1; MS35335-93 Mil. Spec. 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 from bronze construction, ideal for harsh industrial environments and marine applications
• Precise dimensional compatibility with 0.513" ID and 0.9" OD ensuring perfect fit for 1/2" fasteners
• Reliable locking performance maintained across the 0.037-0.045" thickness range for consistent compression
• Industry-standard compliance with ASME B18.21.1 and MS35335-93 specifications for guaranteed quality and interchangeability
• Durable material performance with bronze offering excellent wear characteristics and electrical conductivity
• Optimized for inch system applications in North American industrial equipment and machinery

Professional Applications & Engineering Value

These bronze tooth lock washers provide critical vibration-resistant fastening solutions for demanding industrial applications. The external tooth design creates multiple biting points that dig into both the fastener head and mounting surface, effectively preventing rotational loosening caused by machinery vibration, thermal cycling, and dynamic loads. The bronze material offers natural corrosion resistance while maintaining excellent electrical conductivity, making these washers ideal for electrical grounding applications, marine environments, and chemical processing equipment. Engineered to ASME B18.21.1 standards and military specification MS35335-93, these industrial lock washers deliver reliable performance in heavy machinery, power transmission systems, and automotive assemblies where vibration-induced fastener failure is a constant concern.

Specification Summary & Compliance

This bronze external tooth lock washer features precise dimensional specifications including 0.513" internal diameter, 0.900" outer diameter, and thickness ranging from 0.037" to 0.045" for optimal compression. Manufactured in compliance with ASME B18.21.1 standards and military specification MS35335-93, ensuring dimensional accuracy and performance reliability. The washer is designed for use with 1/2" fasteners in inch system applications and meets industry standards for material quality and manufacturing consistency, providing engineers with certified components for critical fastening applications.