30A threaded locking ring for shore power cord

30A threaded locking ring for shore power cable. Fits "Marinco style" cables. Fits better and is stronger. Has not broken throwing it on the dock like OEM did.

Print in ASA or nylon, CF-nylon, etc for outdoor use. Some filaments need printing at 100.5% scale in order to account for shrinkage. Found this with ASA for sure. PA not as much.