Threading Tools Thread Ridge Shape SEC-Threading Tools Selection Guide ■ External Threading Applications General Industrial Use Pipe Couplings for Gas, Pipe Threads for Steam, AerospaceWater and Water FaucetsGas and Water Supply PipesEquipment Internal Thread Internal Thread Internal Thread Internal Thread Internal Thread Internal Thread Internal Thread Internal Thread Internal Thread F 1˚47' 1˚47' 1˚47'60°55°60°60°55°60°55°60°60° Pitch Pitch Pitch Pitch Pitch Pitch Pitch Pitch Pitch External Thread External Thread External Thread External Thread External Thread External Thread External Thread External Thread External Thread Type 60° General-purposeThread 55° General-purposeThread (Whitworth)60° ISO Metric Thread60° Uni ed Thread55° Parallel Threadfor Pipe/Whitworth60° American NPT 55° Taper Thread for Pipe BSPT60° American NPTF60° UNJ M Symbol W M UNC/UNF G/Rp/W NPT R/Rc NPTF UNJ UNC/UNF mm Pitch Threads/Inch Threads/Inch mm Threads/Inch Threads/Inch Threads/Inch Threads/Inch Threads/Inch Threads/Inch Wiper Edge No No Yes Yes Yes Yes Yes Yes Yes 0.50 to 3.00 48 to 8SSTE Type48 to 8→F840.75, 1.00, 1.251.50, 1.75, 2.002.50, 3.0032, 28, 2420, 18, 1614, 13, 1210, 836, 32, 2824, 20, 1918, 16, 1412, 11, 10827, 18, 1411.5, 828, 1914, 1127, 18, 1411.532, 28, 2420, 18, 1614, 12, 10 1.00 to 3.00 1.00, 1.25, 1.50 24, 20, 1824 to 101.75, 2.00, 2.5016, 14, 12—LTE Type24 to 83.00, 3.50, 4.00828, 19—14, 11 — — →F94 1.00 to 3.00 1.00, 1.25, 1.50 24, 20, 1824 to 101.75, 2.00, 2.5016, 14, 12—STE Type24 to 83.008 28, 19—14, 11 — — →F95 0.80, 1.00, 1.25 0.80 to 3.00 24 to 10 1.50, 1.75, 2.00 — 28, 19 — — — — THE Type 2.50 →F96 3.00 to 6.00 11 to 4.5 — — — — — — — GME-TH Type →F93 0.20 to 1.50 48 to 16 — — — — — — — STH Type →F92 F80