SEC-Threading Tool Series

Selection Guide

■ External Threading

Application Thread riFor general industryFor bind faucets, waing sink ter, and gasThread fo gas, and wr steam, ater pipesFor aerospace instruments
dge shape60° Pitch Internal thread External thread55° Pitch Internal thread External thread60° Pitch Internal thread External thread60° Pitch Internal thread External thread55° Pitch Internal thread External thread60° 1˚47' Pitch Internal thread External thread55° 1˚47' Pitch Internal thread External thread60° 1˚47' Pitch Internal thread External thread60° Pitch Internal thread External thread
TypeGeneral purpose 60`°`threadGeneral purpose 55`°` thread (Whitworth)ISO meter thread 60`°`Unified thread 60`°`Parallel thread for pipes Witworth 55`°`US NPT 60`°`Taper threads for pipe BSPT 55`°`US NPTF 60UNJ 60`°` `°`
SymbolM UNC/UNFWMUNC/UNFG/Rp/WNPTR/RcNPTFUNJ
Pitchmm Threads/inchThreads/inch`mm`Threads/inchThreads/inchThreads/inchThreads/inchThreads/inchThreads/inch
Wiper edgeNoNoYesYesYesYesYesYesYes
`→`F68 SSTE type48 to 8 0.50 to 3.0048 to 80.75, 1.00, 1.25 1.50, 1.75, 2.00 2.50, 3.0032, 28, 24 20, 18, 16 14, 13, 12 10, 836, 32, 28 24, 20, 19 18, 16, 14 12, 11, 10 827, 18, 14 11.5, 828, 19 14, 1127, 18, 14 11.532, 28, 24 20, 18, 16 14, 12, 10
`→`F78 LTE type1.00 to 3.00 24 to 824 to 101.00, 1.25, 1.50 1.75, 2.00, 2.50 3.00, 3.50, 4.0024, 20, 18 16, 14, 12 8`ー``ー`28, 19 14, 11`ー``ー`
`→`F79 STE type24 to 8 1.00 to 3.0024 to 101.00, 1.25, 1.50 1.75, 2.00, 2.50 3.0024, 20, 18 16, 14, 12 8`ー``ー`28, 19 14, 11`ー``ー`
`→`F80 THE type0.80 to 3.0024 to 100.80, 1.00, 1.25 1.50, 1.75, 2.00 2.50`ー`28, 19`ー``ー``ー``ー`
`→`F77 GME-TH type3.00 to 6.0011 to 4.5`ー``ー``ー``ー``ー``ー``ー`
`→`F76 STH type0.20 to 1.5048 to 16`ー``ー``ー``ー``ー``ー``ー`