S-97775A524 0.384" ID x 0.694" OD ASME B18.21.1; MS35335-35 Mil. Spec. External-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance prevents fastener loosening in high-stress environments, ensuring long-term assembly integrity.
• Zinc-plated steel construction provides excellent corrosion resistance, extending service life in industrial settings.
• Rockwell C40 hardness delivers exceptional durability and resistance to deformation under heavy loads.
• External tooth design bites firmly into both the fastener and mounting surface for maximum locking security.
• Precision 0.384" ID and 0.694" OD dimensions ensure perfect fit for 3/8" screws, reducing installation time and errors.
• Compliance with ASME B18.21.1 and MS35335-35 standards guarantees consistent quality and reliability in demanding applications.
• 0.032-0.040" thickness range offers optimal compression and spring action for effective locking performance.

Professional Applications & Engineering Value

This external tooth lock washer is engineered to solve critical vibration-induced loosening in industrial assemblies. Made from zinc-plated steel, it combats corrosion while the Rockwell C40 hardness ensures it withstands repeated stress without losing its locking grip. The external teeth dig into both the bolt head and surface, creating a secure mechanical lock that outperforms standard flat washers. Ideal for heavy machinery, automotive, and construction equipment, this washer maintains vibration resistance in dynamic environments where safety and reliability are paramount. Its precise dimensions and ASME B18.21.1 compliance make it a trusted choice for engineers seeking to prevent assembly failures and reduce maintenance costs.

Specification Summary & Compliance

This washer features precise dimensions with an ID of 0.384", OD of 0.694", and thickness of 0.032-0.040", designed for 3/8" screw sizes. It conforms to ASME B18.21.1 and MS35335-35 specifications, ensuring consistent performance and interchangeability. The zinc-plated steel material and Rockwell C40 hardness meet industrial standards for corrosion resistance and mechanical strength. Additionally, it complies with RoHS and REACH environmental directives, making it suitable for global supply chains and sensitive applications.