b'TUBE TO TUBE UNIONR E D U C I N G U N I O NDIMENSIONST Tube Tx TubeA D Dx E FD F Dx O.D.O.D.Inches1/4 1/8 1.52 0.60 0.50 0.09 1/25/16 1/8 1.56 0.64 0.50 0.09 9/16T Tx 5/16 1/4 1.66 0.64 0.60 0.19 9/163/8 1/16 1.44 0.66 0.34 0.05 5/8E 3/8 1/8 1.61 0.66 0.50 0.09 5/8A 3/8 1/4 1.70 0.66 0.60 0.19 5/83/8 5/16 1.74 0.66 0.64 0.25 5/81/2 1/8 1.78 0.90 0.50 0.09 13/161/2 1/4 1.85 0.90 0.60 0.19 13/161/2 3/8 1.91 0.90 0.66 0.28 13/165/8 3/8 1.94 0.96 0.66 0.28 15/165/8 1/2 2.05 0.96 0.90 0.41 15/163/4 1/4 1.94 0.96 0.60 0.19 1-1/163/4 3/8 2.00 0.96 0.66 0.28 1-1/163/4 1/2 2.11 0.96 0.90 0.41 1-1/163/4 5/8 2.11 0.96 0.96 0.50 1-1/161 1/2 2.38 1.23 0.90 0.41 1-3/81 3/4 2.38 1.23 0.96 0.62 1-3/8Millimetres6 1/8 38.50 15.30 12.80 2.40 146 1/4 41.00 15.30 15.30 4.80 146 5/16 42.30 15.30 16.20 4.80 148 1/4 42.30 16.20 15.30 4.80 1510 1/8 41.80 17.20 12.80 2.40 1810 1/4 44.50 17.20 15.30 4.80 1810 5/16 45.10 17.20 16.20 6.40 1810 3/8 45.90 17.20 16.90 7.10 1812 5/16 47.80 22.80 16.20 6.40 2212 3/8 48.40 22.80 16.90 7.10 2212 1/2 51.20 22.80 22.80 9.50 2215 1/2 52.00 24.40 22.80 10.30 2416 5/8 52.00 24.40 24.40 12.70 2418 3/4 53.50 24.40 24.40 15.10 27Dimensionsforreferenceonly,subjecttochange.TWINLOK - Tube Compression Fittings 13'