Sea-Dog Line - Battery Terminals - Wing Nut Style - 2-5/16" - 4152101. Wing Nut Style Battery Terminals convert battery posts to stud connectors and permit quick disconnection from the battery. Polarity is specific to meet USCG regulations. Die-cast lead construction.. Description. A. B. C. D. Positive/Negative Set. 2-5/16". 5/8"/9/16". 5/16". 3/8"/5/16"