58 34 78 1 14 18 516 316 38 12 NPTTube Fitting Identification Actual Sizes Shown Pipe Thread Diameters Outside Tubing Diameters Outside Tube Fitting Size and Thread Standards 45 SAE Flare 37 SAE Flare OD Tube Size OD Thread OD Thread 18 516 24 516 24 316 38 24 38 24 14 716 20 716 20 516 12 20 12 20 38 58 18 916 18 12 34 1 6 34 16 58 78 1 4 78 14 34 1116 14 1116 12 78 114 12 1316 12 1 138 12 1516 12 114 158 12 112 178 12 2 212 12 114 NPT 11 12 TPI 34 NPT 14 TPI 38 NPT 18 TPI 18 NPT 27 TPI 14 NPT 18 TPI 12 NPT 14 TPI 1 NPT 11 12 TPI 112 NPT 11 12 TPI 2 NPT 11 12 TPI CE WH PHG 250 1108 Copyright 2008 by Wurth 14 0270 Wheel Weight Identification Ounces Grams 14 5 14 10 12 15 34 20 1 25 1 30 1 14 35 1 12 40 Ounces Grams 1 12 45 1 34 50 2 55 2 60 2 12 70 2 34 80 3 14 90 Conversion Chart