Threading Inserts NPT INTERNAL ANSI/ASME B 1.20.1-1983 B NPT NUT B A A 30° 30° L L 90° 1°47' NPT SCREW I.C. I.C. MULTITOOTH STANDARD STANDARD PITCH CATALOG NUMBER DIMENSIONS TPI RIGHT HAND LEFT HAND Lmm I.C. A B 27 NPT27 IR06 NPT27 IL06 06 4.00 0.7 0.5 27 NPT 27 IR08 NPT 27 IL08 0.7 0.6 08 5.00 18 NPT 18 IR08 NPT 18 IL08 0.7 0.7 27 NPT 27 IR11 NPT 27 IL11 0.7 0.8 18 NPT 18 IR11 NPT 18 IL11 11 6.35 0.8 1.0 14 NPT 14 IR11 NPT 14 IL11 0.8 1.0 27 NPT 27 IR16 NPT 27 IL16 0.7 0.8 18 NPT 18 IR16 NPT 18 IL16 0.8 1.0 14 NPT 14 IR16 NPT 14 IL16 16 9.525 0.9 1.2 11.5 NPT 11.5 IR16 NPT 11.5 IL16 1.1 1.5 8 NPT 8 IR16 NPT 8 IL16 1.3 1.8 MULTITOOTH PITCH TEETH CATALOG NUMBERRIGHTHAND ANVIL LTPImm DIMENSIONSI.C. A B 11.5 2 NPT11.5 2M IR22 IS22M 22 12.70 2.4 3.4 11.5 3 NPT11.5 3M IR27 3.5 5.6 IS27M 27 15.875 8 2 NPT8 2M IR27 3.0 4.8 29