RSR Series aluminum NPT thread Cord Grips are UL Listed and CSA Certified for use in both indoor and outdoor applications. Aluminum Cord Grip Connectors are a cost effective way to prevent cable pullout, control arc of bend, and to provide a tight seal against environmental elements such as dirt, moisture and coolants. All aluminum Cord Grip Connectors are designed and made in the USA. Our complete line of aluminum cord grips are available in NPT thread sizes from 1/4" up to 3". If you are terminating S, SO, SJO, SJOW, or W type cable, aluminum cord connectors are a great choice to protect your cable from damage and cable pull-out at the box, enclosure or equipment termination point.