That fits

Description Article no. Article Image  
Male Male DIN 11851 short DN50 1.4307 polished 1101500005010F Male DIN 11851 short DN50 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