Wall Thickness Chart "16,000-Series" Part No. O.D Decimal O.D I.D Wall Thickness 16112 3/8 0.3750 0.193 0.091 16114 7/16 0.4375 0.258 0.090 16116 1/2 0.5000 0.320 0.090 16118 9/16 0.5625 0.383 0.090