1/8th NPT tap

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Tue 10 Jul 2007 23:01
1/8th NPT tap - Dave N
I need to tap a hole for a 1/8th NPT fitting (for a boost gauge). But I can't find a tap anywhere. Is it the same as BSPF?
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Tue 10 Jul 2007 23:18
1/8th NPT tap - 659FBE
No. This is an American pipe thread - get the right tap from a specialist supplier. BSP threads are based on Whitworth pitches.

659.
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Wed 11 Jul 2007 07:57
1/8th NPT tap - jc2
BSP or BSG.BSP is parallel thread-BSG is tapered but both are same TPI.
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Wed 11 Jul 2007 08:42
1/8th NPT tap - cheddar
Can you get an adapter, i.e 1/8th to metric, and tap a metric thread?
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Wed 11 Jul 2007 21:27
1/8th NPT tap - happytorque
1/8th inch NPT is an American Imperial pipe thread (National Pipe Taper Thread ~ NPT)
Some of the sizes actually match up with BSP but its hit and miss because the thread pitch is often different. The 1/8" signifies that its the dia of thread that you would put on the outside diameter of a 1/8 nominal bore pipe. Most companies supplying pipe fittings should be able to point you in the right direction. Try Cromwell Tools they have them in stock but they are £18.39 each (www.cromwell.co.uk)
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Thu 12 Jul 2007 00:33
1/8th NPT tap - lagunatic
1/8th inch NPT is an American Imperial pipe thread (National Pipe Taper Thread ~ NPT)

1/8 NPT has 27 TPI, 1/8 BSP has 28TPI


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Thu 12 Jul 2007 20:09
1/8th NPT tap - storme
email me and i'll send u an 1/8 npt tap

do u want spiral point/ spiral flute or hand tap??
--
sometimes a little bit too much opinion....but its only because i care !!!
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