Split (split-ring) lock washers — metal spring washers designed to prevent nuts, bolts and screws from turning loose under vibration and friction. Key benefits Prevents loosening: The split design bites into the fastener and mating surface to resist rotation caused by vibration and friction. Protects assemblies: Helps maintain clamped preload and reduces the risk of parts becoming loose over time, contributing to machine stability and safety. Even load distribution: Works with the mating fastener to spread the clamping load more evenly across the joint. Fast, tool-free fitting: Can be positioned manually or with standard tightening tools between the fastener and the surface for a secure connection without special installation steps. Durable material: Constructed as metal spring (feder) washers for reliable spring action and wear resistance in typical fastening applications. Broad compatibility: Compatible with nuts and screws of the same size; use the matching washer size for proper performance. Key attributes Function: Anti-rotation locking and load distribution for threaded fasteners. Material: Metal spring washer construction for resilient clamp force. Installation: Simple placement under the nut or screw head; no additional tooling required beyond normal tightening devices. Compatibility: Intended for use with nuts, bolts and screws of corresponding size. Typical applications Industrial machinery: Use on motors, pumps, gearboxes and other equipment subject to vibration to keep critical fasteners secure and preserve machine alignment. Automotive and transportation: Apply on chassis fittings, brackets and fastened components where repeated vibration could back off conventional fasteners. General assembly and maintenance: Ideal for appliances, equipment frames, and structural assemblies where reliable clamping and simple installation are required. Use the washer size that matches your nuts or bolts to ensure correct function and longevity of the joint.