50 A 125/250 V Locking Galvanized Male Plug (HBL63CM65) by Hubbell®. Locking devices - male plug, 4-wire grounding, non-NEMA, galvanized. This product is great for use in all marine applications. It will satisfy the needs of both pleasure boat enthusiasts and ambitious yacht owners. Get this excellent product for your vessel and prepare to embark on a thrilling adventure.