An in-line electrical connector includes a potting boot. The potting boot includes longitudinal ribs are spaced apart from one another about a longitudinal axis of a boot body. Internal thread members project radially inward from an interior surface of the boot body relative to the longitudinal axis. The thread members have arcuate lengths extending about the longitudinal axis of the boot body. Each longitudinal rib has an associated one of the internal thread members that radially overlaps an entirety of the width of the longitudinal rib relative to the longitudinal axis of the boot body. An electrical connector threadably mates to the internal thread members of the potting boot. The electrical connector electrically couples to another electrical connector.