b'SIZE CHARTSACTUAL OUTSIDE DIAMETERS OF PIPE THREADS ACTUAL OUTSIDE DIAMETERS OF TUBINGM 2NPT 5/8" 3/4" 7/8" 1"11 1/2 T.P.I.J1-1/4 NPT K1-1/2NPT11 1/2 T.P.I. 11 1/2 T.P.I.E3/4 NPT H1 NPT14 T.P.I. 11 1/2 T.P.I.C3/8 NPT D1/2 NPT 1/8" 3/16" 1/4" 5/16" 3/8" 1/2"18 T.P.I. 14 T.P.I.A1/8 NPT B1/4 NPT27 T.P.I. 18 T.P.I.METRIC THREAD STANDARDSTUBE SIZE DIN METRIC DIN METRICMM (LIGHT) (HEAVY)FRACTIONAL SIZE CODES 6 M12x1.5 M14x1.5Used with all Part Numbers to designate Tube and Pipe Fractional Sizes. 8 M14x1.5 M16x1.5Tube Size Code 1/16ths 10 M16x1.5 M18x1.51/8 3/16 1/4 5/16 3/8 7/16 1/2 5/8 3/4 7/8 1 1-1/4 1-1/2 2 2-1/2 3 4 12 M18x1.5 M20x1.52 3 4 5 6 7 8 10 12 14 16 20 24 32 40 48 64 14 M22x1.515 M22x1.5 16 M24x1.5Pipe Size Code18 M26x1.5 1/16 1/8 1/4 3/8 1/2 3/4 1 1 1/4 1 1/2 2 2-1/2 3 4 20 M30x2.01 A B C D E H J K M N P S 22 M30x2.0 25 M36x2.028 M36x2.0 30 M42x2.035 M45x2.0 38 M52x2.042 M52x2.0 TUBE FITTING SIZE AND THREAD STANDARDSDASH O.D. 45 S.A.E. FLARE 37 J.I.C. FLARE COMPRESSION 45 INVERTED FLARE THREADED SLEEVESIZE TUBE SIZE O.D. THREAD O.D. THREAD O.D. THREAD O.D. THREAD O.D. THREAD-2 1/8 5/16 24 5/16 24 5/16 24 5/16 28 5/16 24-3 3/16 3/8 24 3/8 24 3/8 24 3/8 24 3/8 24-4 1/4 7/16 20 7/16 20 7/16 24 7/16 24 7/16 24-5 5/16 1/2 20 1/2 20 1/2 24 1/2 20 1/2 20-6 3/8 5/8 18 9/16 18 9/16 24 5/8 18 9/16 20-8 1/2 3/4 16 3/4 16 5/8 24 11/16 18 5/8 18-10 5/8 7/8 14 7/8 14 11/16 20 3/4 18 11/16 16-12 3/4 1-1/16 14 1-1/16 12 13/16 18 7/8 18 -14 7/8 1-1/4 12 1-3/16 12 1 18 1-1/16 16 -16 1 1-3/8 12 1-5/16 12 1-1/8 18 1-3/16 16 -20 1-1/4 1-5/8 12 1-1/4 16 -24 1-1/2 1-7/8 12 -32 2 2-1/2 12 TUBE FITTING SIZE AND THREAD STANDARDSDASH O.D. O-RING BOSS FLARELESS O-RING FACE SEAL BRITISH PIPE TAPER BRITISH PIPE PARALLELSIZE TUBE SIZE O.D. THREAD O.D. THREAD O.D. THREAD O.D. THREAD O.D. THREAD-2 1/8 5/16 24 5/16 24 -3 3/16 3/8 24 3/8 24 -4 1/4 7/16 20 7/16 20 9/16 18 1/4 19 1/4 19-5 5/16 1/2 20 1/2 20 -6 3/8 9/16 18 9/16 18 11/16 16 3/8 19 3/8 19-8 1/2 3/4 16 3/4 16 13/16 16 1/2 14 1/2 14-10 5/8 7/8 14 7/8 14 1 145/8 14 5/8 14-12 3/4 1-1/16 12 1-1/16 12 1-3/16 12 3/4 14 3/4 14-14 7/8 1-3/16 12 1-3/16 12 -16 1 1-5/16 12 1-5/16 12 1-7/16 12 1 11 1 11-20 1-1/4 1-5/8 12 1-5/8 12 1-11/16 12 -24 1-1/2 1-7/8 12 1-7/8 12 2 12 K-32 2 2-1/2 12 2-1/2 12 283'