1.78° 90° 1.78° 1.78° 90° 1.78° THREADING Steam, gas andwater pipes Pipe couplingsfor food and fireMotion transmissionfighting industries Aircraft andaerospace Oil and gas Taper Pipe American Round ISO Trapezoidal American UNJ API Buttress API Round Thread NPTF DIN 405 30° ACME Casing Casing & Tubing BSPT r=0.137278P r=0.221047Pr=0.255967P 0.125P 27.5°27.5° 30° 30° 30° 30° 29° 60° 30° 30° 90° r=0.137278P 10° 3°r=0.238507P0.366P0.3707Pr=0.18042P90° BSPTR(PT)Rc(PS) NPTF RdRp Tr(TM) ACME(Tw) UNJ BCSG CSGLCSG thread/inch thread/inch thread/inch mm thread/inch thread/inch thread/inch thread/inch 19 14 101411.58 1.52.0 1210 * 5 10 8 11 8 6 3.0 8 4 4.05.0 65 – G – – – – – – – – – – – – – – – – – – – – – – – – * When In this machining an internal case, a full form type UNJ thread, cut insert cannot be an internal used. hole with the appropriate diameter. Then machine with 60° American UN. G007