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    3/8″ External-Internal Tooth Lock Washer Zinc

    Part #: LWEI-3/8

    The 3/8″ external-internal tooth lock washer features serrations on both the inner and outer diameters for maximum resistance to loosening due to vibration and torque. Its zinc-plated carbon steel construction offers moderate corrosion protection while maintaining strength for demanding fastening applications. Ideal for electrical, automotive, and machinery assemblies requiring enhanced security and reliability.