S-97775A536 0.32" ID x 0.61" OD ASME B18.21.1; MS35335-90 Mil. Spec. External-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance through external tooth design that maintains constant tension and prevents fastener loosening
• Excellent corrosion resistance from premium bronze material, ideal for harsh industrial environments
• Precise 5/16" screw compatibility with 0.32" ID ensuring perfect fit and optimal locking performance
• Enhanced load distribution with 0.61" OD providing wider surface contact and reduced point stress
• Reliable compliance with ASME B18.21.1 and MS35335-90 specifications for consistent quality and performance
• Durable construction with 0.028-0.034" thickness offering resilience under repeated vibration cycles
• Non-magnetic properties making these washers suitable for electrical and specialized applications

Professional Applications & Engineering Value

These bronze tooth lock washers are engineered to solve critical vibration-induced loosening problems in demanding industrial settings. The external tooth configuration bites into both the bearing surface and fastener head, creating a positive locking action that maintains clamp load under extreme conditions. Made from bronze material, these washers offer natural corrosion resistance without requiring additional coatings, making them ideal for marine, chemical processing, and outdoor applications where environmental factors degrade ordinary steel washers. The precise 5/16" screw size compatibility and ASME B18.21.1 compliance ensure reliable performance in machinery assembly, electrical enclosures, and heavy equipment where vibration resistance is critical to operational safety and maintenance reduction.

Specification Summary & Compliance

This bronze external tooth lock washer features precise dimensional specifications including 0.32" inner diameter, 0.61" outer diameter, and thickness ranging from 0.028" to 0.034". Manufactured to ASME B18.21.1 standards and meeting MS35335-90 specifications, these washers ensure consistent quality and performance in inch system applications. The external tooth location provides maximum locking effectiveness while maintaining compliance with industrial mechanical standards for reliable integration into various assembly requirements.