S-91475A033 0.502" ID x 0.869" OD ASME B18.21.1; MS35338-143 Mil. Spec. Split Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance prevents fastener loosening in high-stress industrial applications
• Exceptional corrosion resistance from passivated 18-8 stainless steel construction for long-term reliability
• Precise 0.502" inner diameter ensures perfect fit for 1/2" screws without slippage
• Rockwell C35 hardness rating provides durable spring tension and maintains locking force
• Industry-standard compliance with ASME B18.21.1 and MS35338-143 ensures consistent performance
• Environmental regulation compliance with RoHS 3 and REACH for global manufacturing applications
• Heavy-duty 0.125" thickness delivers reliable spring action and extended service life

Professional Applications & Engineering Value

This split lock washer delivers critical vibration resistance in demanding industrial environments where fastener security is paramount. The passivated 18-8 stainless steel construction provides excellent corrosion resistance, making it ideal for applications exposed to moisture, chemicals, or outdoor conditions. The standard split lock design creates continuous spring tension that compensates for thermal expansion, vibration, and load variations in machinery, automotive, and construction applications. With its Rockwell C35 hardness and precise 0.502" ID, this washer maintains consistent locking force on 1/2" fasteners, preventing costly downtime from loose connections in critical assemblies.

Specification Summary & Compliance

This split lock washer features a 0.502" inner diameter, 0.869" outer diameter, and 0.125" thickness, manufactured to exacting ASME B18.21.1 and MS35338-143 specifications. The component is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for global industrial applications requiring strict material compliance standards.