Threading Inserts NPTF EXTERNAL ANSI B 1.20.3-1976 B NPTF NUT A B A 30° 30° L L 90° 1°47' NPTF SCREW I.C. I.C. MULTITOOTH STANDARD STANDARD PITCH CATALOG NUMBER DIMENSIONS TPI RIGHT HAND LEFT HAND Lmm I.C. A B 27 NPTF 27 ER11 NPTF 27 EL11 0.7 0.8 18 NPTF 18 ER11 NPTF 18 EL11 11 6.35 0.8 1.0 14 NPTF 14 ER11 NPTF 14 EL11 0.8 1.0 27 NPTF 27 ER16 NPTF 27 EL16 0.7 0.8 18 NPTF 18 ER16 NPTF 18 EL16 0.8 1.0 14 NPTF 14 ER16 NPTF 14 EL16 16 9.525 0.9 1.2 11.5 NPTF 11.5 ER16 NPTF 11.5 EL16 1.1 1.5 8 NPTF 8 ER16 NPTF 8 EL16 1.3 1.8 MULTITOOTH PITCH TEETH CATALOG NUMBERRIGHT HAND ANVIL LTPImm DIMENSIONSI.C. A B 11.5 2 NPTF11.5 2M ER22 ES22M 22 12.70 2.4 3.4 30