S-91475A509 0.628" ID x 1.073" OD ASME B18.21.1; MS35338-145 Mil. Spec. Split Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance due to the split lock design that maintains constant tension under dynamic loads
• Enhanced corrosion protection from black-oxide coated 18-8 stainless steel construction for harsh environments
• Consistent locking performance ensured by Rockwell C35 hardness for reliable spring action and fastener retention
• Precise dimensional compatibility with 5/8" fasteners through exact 0.628" ID and 1.073" OD specifications
• Industry-standard compliance with ASME B18.21.1 and MS35338-145 for guaranteed interchangeability and quality
• Environmental regulation adherence through RoHS 3 and REACH compliance for global supply chain compatibility
• Durable 0.156" thickness provides optimal spring force while resisting deformation under high stress conditions

Professional Applications & Engineering Value

This 5/8" split lock washer delivers critical vibration resistance in demanding industrial applications where fastener loosening poses significant operational risks. The black-oxide 18-8 stainless steel construction addresses corrosion concerns in chemical processing, marine, and outdoor equipment while maintaining the material's inherent strength. The standard split lock washer design creates continuous radial pressure that compensates for thermal expansion, vibration-induced movement, and material relaxation. Engineered to ASME B18.21.1 specifications, this component ensures reliable performance in heavy machinery, automotive assemblies, structural frameworks, and power transmission systems where maintaining bolt preload is essential for safety and operational continuity. The combination of Rockwell C35 hardness and precise dimensional control prevents galling while providing consistent spring action throughout the washer's service life.

Specification Summary & Compliance

Manufactured to exact inch system dimensions: 0.628" ID, 1.073" OD, and 0.156" thickness for 5/8" fasteners. The split lock washer meets ASME B18.21.1 and MS35338-145 specifications for dimensional accuracy and performance requirements. Material certification confirms 18-8 stainless steel with black-oxide surface treatment. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental responsibility and global market acceptance.