JL5 Series circular connectors are mode according to Ministry of Railway standard TB/T2716-1996.The connctor's socket is covered with guided stainless sleeve and allows the connector to have the advantages of low contact resistance,long endurance,etc.The connector type between the plug and the receptacles is bayonect coupling with quick mating and easy use.This connector is widely used for the connection of electrial equipment of rail train.The plug or the receptacle may be mounted with both pins and sockets.