The threaded ring and sealing collar are designed for use with 50A power cords commonly used with RVs, generators, marine shore power, etc. The threaded ring is attached to either the male plug or female connector side of the cord and securely screws around the sealing collar to offer maximum protection from water damage.
This NEMA 5-15P, 15A assembly/replacement plug can easily be wired for many different devices such as fans, heaters, and radios that use this configuration.
This 20A NEMA 5-20 straight blade assembly plug comes in an impact resistant black nylon casing. This configuration is commonly used with refrigerators, microwaves, kitchen appliances, and for some EV charging equipment.