That fits

Description Article no. Article Image  
Male Male DIN 11851 short DN20 1.4307 polished 1101500002010F Male DIN 11851 short DN20 1.4307 polished
Seal Ring Seal Ring DIN 11851 DN20 NBR 1000400002054 Seal Ring DIN 11851 DN20 NBR
Nut Nut DIN 11851 with Undercut DN20 1.4301/1.4307 polished 1100300002010F Nut DIN 11851 with Undercut DN20 1.4301/1.4307 polished