Commercial Electric's Metallic Strain Relief Cord Connectors are used to secure and seal service cable entering an enclosure or conduit hub. for use in. Wet or dry locations sealing electrical connections against dust and dirt, oil, water or other atmosphere contaminants. Rubber sealing grommet firmly but safely grips cable jacket providing strain relief while protecting internal wiring connections against external tension on cable or cord. Steel washer reduces friction between grommet and connector cap providing even pressure distribution, eliminating leakage resulting from grommet distortion. Available in a wide range of trade sizes. Material: Alloy.