A E F G H PART NO. mm mm mm mm mm mm 3 35.3 2.4 11 11 22.1 D-U3 6 41 4.8 14 14 26.2 D-U6 8 43.2 6.3 16 16 26.2 D-U8 10 46.2 7.9 17 19 31 D-U10 12 51.2 9.5 22 22 31 D-U12 14 52 11.1 24 25 31 D-U14 15 52 11.9 24 25 31.8 D-U15 16 52 12.7 24 25 31.8 D-U16 18 53.5 15.1 27 30 33.3 D-U18 20 55 15.9 30 32 34.8 D-U20 22 55 18.3 30 32 34.8 D-U22 25 65 21.8 35 38 40.4 D-U25 TUBE OD - T A E F G H PART NO. inch mm mm mm mm mm 1/8 35.6 2.4 11 11 22.4 2D-U 1/4 40.9 4.8 14 14 26.2 4D-U 5/16 42.9 6.3 14 16 28.2 5D-U 3/8 45 7.1 16 17 30.2 6D-U 1/2 51.3 10.4 22 22 31 8D-U 5/8 52 12.7 24 25 31.8 10D-U 3/4 53.6 15.8 27 28.5 33.3 12D-U 7/8 55.2 18.2 30 32 34.8 14D-U 1 64.8 22.3 35 38 40.4 16D-U Stainless Steel Unions Stainless Steel compression Unions male female unions SS 304 316 A2 A4 fittings