SEC-Threading Tool Series Selection Guide ■ External Threading Application For binding sink Thread for steam, For aerospace Thread ridge shape For general industry faucets, water, and gas gas, and water pipes instruments Internal thread Internal thread Internal thread Internal thread Internal thread Internal thread Internal thread Internal thread Internal thread 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 General purpose General (pWurhpitowsoert5h5)°ISO meter thread 60°Uni ed thread 60°ParalleWl itthwroerathd for pipes US NPT 60°TaperBthSrPeaTd5s5f°or pipe US NPTF 60° UNJ 60° 60°thread thread 55° Symbol M W M UNC/UNF G/Rp/W NPT R/Rc NPTF UNJ UNC/UNF Pitch mm Threads/inch mm Threads/inch 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 32, 28, 24 36, 32, 28 F 0.75, 1.00, 1.25 20, 18, 16 24, 20, 19 27, 18, 14 28, 19 27, 18, 14 32, 28, 24 48 to 8 1.50, 1.75, 2.00 14, 13, 12 18, 16, 14 11.5, 8 14, 11 11.5 20, 18, 16 Threading tool SSTE type 48 to 8 2.50, 3.00 10, 8 12, 11, 10 14, 12, 10 →F68 8 Grooving 1.00 to 3.00 1.00, 1.25, 1.50 24, 20, 18 Cut-Off 24 to 10 1.75, 2.00, 2.50 16, 14, 12 ー ー 28, 19 ー ー Threading 3.00, 3.50, 4.00 8 14, 11 LTE type 24 to 8 →F78 1.00 to 3.00 1.00, 1.25, 1.50 24, 20, 18 24 to 10 1.75, 2.00, 2.50 16, 14, 12 ー ー 28, 19 ー ー 3.00 8 14, 11 STE type 24 to 8 →F79 0.80, 1.00, 1.25 0.80 to 3.00 24 to 10 1.50, 1.75, 2.00 ー 28, 19 ー ー ー ー THE type 2.50 →F80 3.00 to 6.00 11 to 4.5 ー ー ー ー ー ー ー GME-TH type →F77 0.20 to 1.50 48 to 16 ー ー ー ー ー ー ー STH type →F76 F64