S-97775A525 0.448" ID x 0.76" OD ASME B18.21.1; MS35335-36 Mil. Spec. External-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance with external teeth that bite into mating surfaces to prevent fastener loosening under dynamic loads
• Enhanced corrosion protection through zinc-plated steel construction, extending service life in demanding industrial environments
• Consistent locking performance maintained by Rockwell C40 hardness, ensuring reliable fastener security across repeated installations
• Precise dimensional compatibility with 7/16" fasteners (0.448" ID, 0.76" OD) for seamless integration into existing assembly systems
• Industry-standard compliance with ASME B18.21.1 and MS35335-36 specifications, guaranteeing interchangeability and quality assurance
• Optimized load distribution through controlled thickness (0.032-0.040") that minimizes surface damage while maximizing clamping force
• Reduced maintenance requirements through durable tooth design that maintains locking action without frequent retightening

Professional Applications & Engineering Value

This external tooth lock washer addresses critical vibration-induced loosening in heavy machinery, automotive assemblies, and structural frameworks. The zinc-plated steel construction provides essential corrosion resistance while the external teeth create positive mechanical locking by embedding into both the fastener head and base material. With Rockwell C40 hardness, the washer maintains tooth integrity through multiple installation cycles, making it ideal for equipment subjected to constant vibration or thermal cycling. The precisely engineered tooth geometry distributes clamping force evenly, preventing surface marring while ensuring reliable fastener security in demanding industrial applications where safety and performance cannot be compromised.

Specification Summary & Compliance

Manufactured to exacting dimensional standards with 0.448" inner diameter, 0.76" outer diameter, and 0.032-0.040" thickness range. Complies with ASME B18.21.1 tooth lock washer specifications and military standard MS35335-36 requirements. The external tooth configuration ensures positive locking action while the zinc-plated finish provides corrosion protection. Suitable for use with 7/16" fasteners in inch measurement systems, this washer meets industry standards for material quality, dimensional accuracy, and performance in vibration-prone applications.