S-97775A523 0.32" ID x 0.61" OD ASME B18.21.1; MS35335-34 Mil. Spec. External-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance with external teeth that bite into mating surfaces, preventing loosening in high-stress environments
• Enhanced corrosion protection through zinc-plated steel construction, extending service life in harsh industrial conditions
• Reliable hardness performance with Rockwell C40 rating ensuring consistent clamping force and deformation resistance
• Precise dimensional compatibility with 0.32" ID and 0.61" OD designed specifically for 5/16" screw applications
• Industry-standard compliance meeting ASME B18.21.1 and MS35335-34 specifications for quality assurance
• Optimized thickness range (0.028-0.034") providing ideal compression characteristics for secure fastening
• Heavy-duty construction capable of maintaining maximum clamping force under extreme mechanical loads

Professional Applications & Engineering Value

This 5/16" external tooth lock washer delivers critical engineering solutions for applications where vibration-induced fastener failure poses significant risks. The zinc-plated steel construction provides essential corrosion resistance while maintaining the structural integrity needed for heavy-duty industrial environments. The strategically positioned external teeth create multiple biting points that dig into both the fastener and substrate, distributing clamping force evenly and preventing rotational loosening. This design is particularly valuable in automotive assemblies, machinery maintenance, and industrial equipment where constant motion and vibration would compromise standard washers. By meeting ASME B18.21.1 and MS35335-34 specifications, this washer ensures reliable performance in critical fastening applications, reducing maintenance frequency and preventing costly downtime.

Specification Summary & Compliance

This external tooth lock washer features precise inch system dimensions with 0.32" internal diameter, 0.61" outer diameter, and thickness ranging 0.028-0.034" for consistent performance with 5/16" fasteners. Manufactured to ASME B18.21.1 and MS35335-34 specifications, it ensures dimensional accuracy and functional reliability. The Rockwell C40 hardness provides optimal balance between strength and flexibility. The zinc-plated steel material offers corrosion resistance while maintaining compliance with industry standards for mechanical fasteners in demanding applications.