S-5185N128 0.26" ID x 0.487" OD ASME B18.21.1 Split Lock Washers

Key Features & Benefits at a Glance

• Exceptional vibration resistance through the split lock design that maintains tension under dynamic loads
• Superior corrosion protection with zinc-flake coating that extends service life in harsh environments
• Reliable spring action with Rockwell C38 hardness ensuring consistent locking force over repeated cycles
• Precision dimensional fit with 0.26" ID specifically engineered for secure fastening on 1/4" screws
• Industry-standard compliance meeting ASME B18.21.1 specifications for guaranteed performance
• Environmental responsibility with full RoHS 3 and REACH compliance for safe industrial use
• Optimized load distribution with 0.487" OD providing broader surface contact for enhanced joint integrity

Professional Applications & Engineering Value

This zinc-flake-coated steel split lock washer delivers critical vibration resistance in demanding mechanical assemblies where loosening under dynamic loads poses significant failure risks. The standard split lock design creates continuous spring tension that compensates for thermal expansion, material relaxation, and vibration-induced movement in equipment ranging from industrial machinery to automotive systems. Engineered specifically for 1/4" screw applications, the 0.26" internal diameter ensures precise fitment while the 0.487" outer diameter provides optimal load distribution. The Rockwell C38 hardness maintains structural integrity under repeated stress cycles, making this ASME B18.21.1 compliant washer ideal for maintenance-critical applications where disassembly and reassembly are frequent.

Specification Summary & Compliance

This split lock washer features precise inch system dimensions with 0.26" internal diameter, 0.487" outer diameter, and 0.062" thickness, manufactured to ASME B18.21.1 specifications for dimensional accuracy and performance reliability. The component demonstrates full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring suitability for global industrial applications while maintaining the Rockwell C38 hardness required for consistent spring performance in vibration-prone environments.