S-97775A535 0.256" ID x 0.51" OD ASME B18.21.1; MS35335-89 Mil. Spec. External-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance through external tooth design that bites into mating surfaces for reliable locking performance
• Corrosion-resistant bronze construction ensures long service life in demanding industrial environments
• Precision dimensional accuracy with 0.256" ID and 0.51" OD for perfect fit with 1/4" fasteners
• Industry-standard compliance with ASME B18.21.1 and MS35335-89 specifications for guaranteed quality
• Optimal thickness range of 0.023-0.028" provides consistent compression and locking force
• External tooth configuration maximizes surface contact for enhanced anti-loosening protection
• Inch system compatibility ensures seamless integration with existing industrial equipment and assemblies

Professional Applications & Engineering Value

These bronze tooth lock washers deliver exceptional engineering value in applications where vibration-induced loosening poses significant reliability concerns. The external tooth design creates multiple biting points that dig into both the fastener head and bearing surface, effectively preventing rotational movement under dynamic loads. The bronze material offers natural corrosion resistance while maintaining excellent mechanical properties, making these washers ideal for marine environments, chemical processing equipment, and electrical applications where galvanic corrosion must be avoided. With precise 1/4" screw compatibility and adherence to ASME B18.21.1 standards, these washers provide predictable performance in machinery assembly, automotive systems, and industrial maintenance where consistent locking action is critical for operational safety and reduced maintenance intervals.

Specification Summary & Compliance

This external tooth lock washer features precise dimensional specifications including 0.256" internal diameter, 0.51" outer diameter, and thickness ranging from 0.023" to 0.028". The washer is manufactured to comply with ASME B18.21.1 standards for tooth lock washers and MS35335-89 military specifications, ensuring consistent quality and performance. The bronze construction provides inherent corrosion resistance while the external tooth configuration delivers reliable anti-vibration characteristics. These washers are suitable for use in inch-system applications and meet industry standards for mechanical fastening components in demanding industrial environments.