S-91475A820 0.628" ID x 1.073" OD ASME B18.21.1; MS35338-50 Mil. Spec. Split Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance with the split lock design that maintains tension under dynamic loads, preventing fastener loosening in high-stress applications.
• Enhanced corrosion protection from the cadmium-plated steel finish, extending service life in harsh industrial environments and reducing maintenance costs.
• Reliable hardness performance with Rockwell C38 rating, ensuring consistent spring action and durability without deformation under repeated use.
• Precise dimensional fit with 0.628" ID and 1.073" OD for exact compatibility with 5/8" screws, minimizing installation errors and improving assembly efficiency.
• Compliance with industry standards including ASME B18.21.1 and MS35338-50, guaranteeing quality, interchangeability, and safety in regulated sectors.
• Optimized thickness of 0.156" for effective locking force while maintaining space efficiency in compact assemblies.
• Broad applicability in inch-based systems, making them ideal for North American machinery, automotive, and construction projects requiring standardized components.

Professional Applications & Engineering Value

This 5/8" split lock washer is engineered to address critical challenges in industrial settings where vibration and dynamic loads compromise fastener integrity. Made from cadmium-plated steel, it provides excellent resistance to corrosion and wear, essential for outdoor equipment, automotive suspensions, and heavy machinery exposed to moisture and chemicals. The standard split lock washer type with precise dimensions (0.628" ID, 1.073" OD) ensures a secure fit on 5/8" screws, reducing the risk of assembly failures. By meeting ASME B18.21.1 and MS35338-50 specifications, it delivers consistent performance in applications like aerospace, manufacturing, and construction, where reliability and compliance are paramount. Its Rockwell C38 hardness maintains spring tension over time, preventing loosening and minimizing downtime in high-vibration environments.

Specification Summary & Compliance

This washer features inch system dimensions with an ID of 0.628", OD of 1.073", and thickness of 0.156", designed for 5/8" screw sizes. It adheres to ASME B18.21.1 and MS35338-50 standards, ensuring precise thread engagement and dimensional accuracy. The cadmium-plated steel material and Rockwell C38 hardness provide durability and corrosion resistance, compliant with industry requirements for reliability in mechanical assemblies.