S-5185N131 0.385" ID x 0.68" OD ASME B18.21.1 Split Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance through the split lock design that maintains consistent tension under dynamic loads
• Enhanced corrosion protection with zinc-flake coating that provides excellent resistance to industrial environments
• Reliable locking performance with Rockwell C38 hardness ensuring consistent spring action and fatigue resistance
• Precise fit for 3/8" fasteners with 0.385" ID and 0.68" OD dimensions for optimal installation and load distribution
• Industry-standard compliance meeting ASME B18.21.1 specifications for dimensional accuracy and performance
• Environmental responsibility with full RoHS 3 and REACH compliance for global manufacturing applications
• Durable construction using steel material that maintains integrity under repeated stress cycles

Professional Applications & Engineering Value

This split lock washer delivers critical vibration-resistant performance in demanding industrial environments where fastener loosening can compromise equipment safety and operational continuity. The zinc-flake-coated steel construction provides dual protection against corrosion while maintaining the necessary spring tension to prevent back-off in high-vibration applications. Engineered to ASME B18.21.1 standards, these washers ensure precise dimensional tolerances for reliable performance in machinery, automotive assemblies, and heavy equipment. The Rockwell C38 hardness guarantees consistent spring action through repeated loading cycles, making them ideal for maintenance-critical applications where disassembly and reassembly are frequent. With full compliance to international environmental regulations, these washers support sustainable manufacturing initiatives without compromising on mechanical performance.

Specification Summary & Compliance

This split lock washer features precise dimensional specifications including 0.385" ID, 0.68" OD, and 0.094" thickness designed for 3/8" screw applications. Manufactured to ASME B18.21.1 standards with Rockwell C38 hardness ensuring proper spring characteristics and fatigue resistance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting current environmental standards for industrial components. The standard split lock washer type provides reliable performance in inch system applications where vibration resistance is critical.