CROSS REFERENCE OF THREAD PITCHS (INTERNAL)

ApplicationGeneral machiningPipe fittings a for gas ai nd couplings nd water
Type60° 60° Partial Profile55° 55° Partial Profile60° 0.125P 0.25P ISO Metric60° 0.25P 0.125P UN American55° r=0.137329P r=0.137329P Parallel Pipe Thread Whitworth for BSW, BSP30° 30° 90° 1.78° NPT American
SymbolM UNC UNFWMUNC UNFG(PF) WNPT
HolderPitchmm (thread/inch)thread/inchmmthread/inchthread/inchthread/inch
MMT Boring Bars0.5 2.5 0.75 3.0 1.0 3.532 12 28 11 24 1028 11 26 10 20 927 18 14
Full1.25 4.0 1.5 4.520 9 18 819 8 18 711.5 8
form1.75 5.0 2.016 7 14 6 13 516 6 14 5 12
0.5 –1.5(48–16) 1.75–3.0(14– 8)48–16 14– 80.5 –1.5 1.75–3.048–16 14– 8
Partial form0.5 –3.0(48– 8) 3.5 –5.0(07– 5)48– 8 7– 50.5 –3.0 3.5 –5.048– 8 7– 5
^ G026
^ G031 ^ G032 FSL5 SL5N Boring BarsPartial form1.5–2.0(16–13) 1.5–2.5(16–11) 1.5–3.5(16– 7)1.5–2.0 1.5–2.5 1.5–3.516–13 16–11 16– 7
MICRO-MINI TWIN ^ G034Partial form0.5 –1.0 (36–24) 0.75–1.25(28–20) 0.75–1.5 (24–18) 0.75–1.75(24–16)0.5 -1.0 0.75-1.25 0.75-1.5 0.75-1.7536–24 28–20 24–18 24–16