THREADING 90° 1.78° THREADING CROSS REFERENCE OF THREAD PITCHS (EXTERNAL) Application General machining Pipe fittings and couplingsfor gas and water Partial Profile Partial Profile ISO Metric American Parallel Pipe American 60° 55° UN Thread NPT Whitworth for BSW, BSP Type 0.125P 0.125P 60° r=0.137329P55°60°60° 30° 30°55° 0.25P 0.25P r=0.137329P Symbol MUNC WUNF M UNCUNF G(PF)W NPT Holder Pitch mm(thread/inch) thread/inch mm thread/inch thread/inch thread/inch MMT Holder 0.5 2.5 32 12 28 11 27 0.75 3.0 28 11 26 10 18 1.0 3.5 24 10 20 9 14 G Full – – 1.25 4.0 20 9 19 81.54.518818711.58 form 1.75 5.0 16 7 16 6 2.0 14 6 14 5 13 5 12 0.5 – 1.5(48 – 16) 48 – 16 0.5 – 1.5 48 – 16 1.75 – 3.0(14 – 8) 14 – 8 1.75 – 3.0 14 – 8 Partial 0.5 – 3.0(48 – 8) 48 – 8 0.5 – 3.0 48 – 8form3.5– 5.0(07 –5)7–53.5– 5.07–5– – ^ G021 G004