CEJN 10-410-5457 Nipple 3/4" Male NPT Series 410 couplings are an original CEJN design that has become a European standard. The Series is one-hand operated and offers long service life. A wide range of connections is available, as well as anti-hose whip nipples. The Series eSafe 410 version is disconnected in two stages in order to vent the coupling and minimize the risk of sudden component separation, which has the potential to cause operator injury. The one-hand operation ensures easy handling. The eSafe version complies with ISO Standard 4414 and EN 983 and has a steel front part as standard.