S-97775A526 0.513" ID x 0.9" OD ASME B18.21.1; MS35335-37 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 under dynamic loads
• Enhanced corrosion protection through zinc-plated steel construction, extending service life in harsh industrial environments
• Reliable load distribution with precise 0.9" OD and 0.513" ID dimensions, ensuring proper fit for 1/2" fasteners
• Consistent performance maintained by Rockwell C40 hardness, resisting deformation under high clamping forces
• Guaranteed interchangeability through compliance with ASME B18.21.1 and MS35335-37 standards
• Optimized thickness range (0.037-0.045") provides ideal spring tension while accommodating surface variations
• External tooth configuration offers maximum gripping action without compromising the bolt head or nut surface

Professional Applications & Engineering Value

This external tooth lock washer delivers critical engineering solutions for vibration-prone assemblies. The zinc-plated steel construction combats corrosion in manufacturing facilities, automotive applications, and heavy machinery where environmental factors degrade fastener integrity. The precisely formed external teeth create positive mechanical locking by embedding into both the fastener head and workpiece surface, effectively solving the common industrial problem of joint relaxation under cyclic loading. Meeting ASME B18.21.1 and MS35335-37 specifications, this 1/2 inch washer provides certified reliability for critical connections in construction equipment, industrial motors, and transportation systems where safety depends on maintained clamp load.

Specification Summary & Compliance

Manufactured to ASME B18.21.1 dimensional standards and MS35335-37 requirements with inch system measurements. Features precise internal diameter of 0.513" and external diameter of 0.9" for perfect compatibility with 1/2" fasteners. The consistent Rockwell C40 hardness ensures mechanical properties remain stable through repeated use. Compliant with industry standards for tooth lock washers and suitable for applications requiring reliable vibration resistance.