That fits

Description Article no. Article Image  
Male Male DIN 11851 long DN50 1.4301/1.4307 polished 1101300005010F Male DIN 11851 long DN50 1.4301/1.4307 polished
Seal Ring Seal Ring DIN 11851 DN50 NBR 1000400005054 Seal Ring DIN 11851 DN50 NBR
Nut Nut DIN 11851 with Undercut DN50 1.4301/1.4307 polished 1100300005010F Nut DIN 11851 with Undercut DN50 1.4301/1.4307 polished