Spring washers, also known as spring lock washers, are split at one point and formed into a helical shape. This design generates a spring force when compressed between the fastener head and the substrate, maintaining tension and increasing friction to resist loosening caused by vibration or dynamic loads.
Applicable Standards
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ASME B18.21.1
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DIN 127B, DIN 128
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GOST 6402-70
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NASM 35338 (formerly MS 35338 and AN-935)
Materials
Typically manufactured from spring steels such as 65Mn, #70 steel, or stainless steel, ensuring optimal elasticity and load retention.
Surface Finishes
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Carbon steel versions available in zinc plating, yellow zinc, hot-dip galvanizing, or black oxide.
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Stainless steel versions are generally passivated for enhanced corrosion resistance and long-term durability.
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