Core hole diameters Tapping American pipe thread t1 min D2 American standard pipe thread in accordance with ASME B1 20 1, taper 1:16 0 P threads

Core hole diameters Tapping American pipe thread t1 min. D2 American standard pipe thread in accordance with ASME B1.20.1, taper 1:16 0 P threads per inch D1 mm D2 mm D3 t1 mm 1/16-27 NPT 6.15 5.95 6.39 10.7 1/8-27 NPT 8.40 8.31 8.74 10.8 1/4-18 NPT 11.10 10.73 11.36 15.6 3/8-18 NPT 14.30 14.15 14.80 16.0 1/2-14 NPT 17.90 17.47 18.32 20.8 3/4-14 NPT 23.30 22.79 23.67 21.3 1-11 1/2 NPT 29.00 28.64 29.69 25.6 1 1/4-11 1/2 NPT 37.70 37.37 38.45 26.1 1 1/2-11 1/2 NPT 43.70 43.44 44.52 26.1 2-11 1/2 NPT 55.60 55.45 56.56 26.5 2 1/2-8 NPT 66.30 66.14 67.62 36.3 3-8 NPT 82.30 81.90 83.52 38.5 American standard in accordance with pipe thread ASME B1.20.3, taper 1:16 0 P threads D1 D2 D3 t1 per inch mm 1/16-27 NPTF 6.1 5.97 6.41 10.3 1/8-27 NPTF 8.4 8.33 8.77 10.3 1/4-18 NPTF 11.0 10.77 11.40 15.0 3/8-18 NPTF 14.5 14.19 14.84 15.3 1/2-14 NPTF 17.5 17.48 18.33 19.9 3/4-14 NPTF 23.0 22.84 23.72 20.4 1-11 1/2 NPTF 29.0 28.62 29.76 24.5 1 1/4-11 1/2 NPTF 37.5 37.44 38.52 25.0 1 1/2-11 1/2 NPTF 43.5 43.50 44.59 25.0 2-11 1/2 NPTF 56.0 55.51 56.62 25.4 2 1/2-8 NPTF 66.0 66.03 67.71 38.0 3-8 NPTF 82.0 81.80 83.62 40.0 60" 41V D h H Kl RC 1 J American parallel 1 11 IVI pipe thread in accordance with ASME B1.20.1 D M J. 0 P threads per inch max. mm >Kv 0 mm 1/8-27 9.246 9.1 1/4-18 12.217 12 3/8-18 15.545 15.5 1/2-14 19.279 19 3/4-14 24.639 24.5 1 11 1/2 30.759 30.5 1 1/4-11 1/2 39.497 39.5 1 1/2-11 1/2 45.568 45.5 2-11 1/2 57.607 57.5 2 1/2-8 69.266 69 3 8 85.166 85 D 469 Technical information threading WALTER PROTOTYP