S-98437A135 0.641" ID x 0.917" OD ASME B18.21.1 Split Lock Washers for Socket Head Screws

Key Features & Benefits at a Glance

• Superior vibration resistance prevents loosening under dynamic loads, ensuring long-term joint integrity
• 18-8 stainless steel construction provides excellent corrosion resistance for harsh industrial environments
• Rockwell C35 hardness maintains spring tension and prevents permanent deformation under load
• Precision 0.641" ID and 0.917" OD dimensions ensure perfect fit for 5/8" fasteners and consistent performance
• ASME B18.21.1 compliance guarantees standardized quality and interchangeability across industrial applications
• RoHS 3 and REACH compliance meets global environmental regulations for safe usage in sensitive applications
• Split lock design creates continuous spring action that compensates for thermal expansion and vibration-induced movement

Professional Applications & Engineering Value

This 5/8" split lock washer delivers critical vibration damping in demanding industrial settings where fastener security is paramount. The 18-8 stainless steel composition resists chemical corrosion and oxidation, making it ideal for food processing equipment, marine applications, and outdoor machinery exposed to moisture. The split lock washer type functions as a spring that maintains constant pressure between fastener components, effectively preventing back-off in high-vibration environments like motors, pumps, and heavy machinery. With Rockwell C35 hardness, the washer maintains its spring properties without taking a permanent set, ensuring reliable performance through thermal cycles and mechanical stress. The standardized ASME B18.21.1 dimensions guarantee proper fit and function across industrial maintenance and OEM assembly operations.

Specification Summary & Compliance

This standard split lock washer features precise dimensions of 0.641" inner diameter, 0.917" outer diameter, and 0.203" thickness, engineered for 5/8" screw applications. Manufactured to ASME B18.21.1 specifications for dimensional accuracy and performance requirements. The component is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for global industrial supply chains.