The right tap will fix your problem. You might also use a metal sealant to
insure it never leaks but it will also never be removable. You could try
liquid silicone pipe sealer or regular pipe dope, they may never leak- if it
does, than you could go to the metal type sealer.I cant remember the name but
all parts stores carry it.
NPT Bottoming Pipe Taps
HIGH SPEED STEEL - GROUND THREAD
MADE IN THE USA BY REIFF & NESTOR
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---
NPT threads require the use of a sealant to ensure a tight seal.
Normally used for pipefittings and couplings. The nominal size of the tap is
that of the pipefitting and not the actual size of the tap
Bottoming chamfer used mostly for tapping blind holes requiring full threads
near the bottom of the hole.
Click here to chat with sales
NPT Ground Thread Regular Bottom
(Picture may not be an exact match)
Tap Size Flutes Part Number Price Qty 1-11 Price Qty 12+ Order Quantity
1/16-27 4 RFN-46101 $ 16.47 $ 14.98
1/8-27 4 RFN-46105 $ 16.47 $ 14.98
1/4-18 4 RFN-46111 $ 18.48 $ 16.82
3/8-18 4 RFN-46117 $ 23.62 $ 21.49
The Taps below start qty discounts at three pieces.
Tap Size Flutes Part Number Price Qty 1-2 Price Qty 3+ Order Quantity
1/2-14 4 RFN-46123 $ 39.31 $ 35.77
3/4-14 5 RFN-46130 $ 57.00 $ 51.88
The Taps below come standard in single pieces
Tap Size Flutes Part Number Price Order Quantity
1-11 1/2 5 RFN-46133 $ 73.61
1 1/4-11 1/2 5 RFN-46137 $104.78
1 1/2-11 1/2 7 RFN-46139 $141.57
2-11 1/2 7 RFN-46145 $191.92
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HOME BROWSE CATALOG ONLINE RESOURCES LINKS HELP
Customer Service 1-877-848-8665
General Information:info@discount-tools.com
Sales Questions or Quotes:sales@discount-tools.com
--- On Mon, 4/4/11, Jerry & Maureen (Mo) <JCMC2006@suddenlink.net> wrote:
> From: Jerry & Maureen (Mo) <JCMC2006@suddenlink.net>
> Subject: Re: [Tigers] Stinkin NPT adapters....@ wits end.
> To: "'Samouce's'" <wsamouce@kc.rr.com>, tigers@autox.team.net
> Date: Monday, April 4, 2011, 11:03 PM
> Pipe fittings aren't designed to sit
> flush when installed. Now if you
> wanted it to set down more flush you have to use the proper
> pipe tap to make
> the hole a little bigger so the fitting screws down
> further. This can be a
> very slippery slope, because pipe connections are tapered
> and if you start
> going deeper you take the chance of going too deep then
> your fitting will
> never seal. The only option then is to start over with the
> next larger size
> pipe size. If you are familiar with pipe tapes you
> know there is a BIG
> difference in the sizes, going from 1/8 to 1/4 to 3/8 to
> 1/2 there are big
> jumps in the sizes.
>
> Any time I have ever seen a pipe joint flush is because
> someone has done a
> very bad job of tapping the hole, going far too deep. The
> very principal of
> a pipe joint is the taper effect where the deeper the
> fitting goes the
> tighter it gets.
>
> Now, it's true that if you were very "careful" and taped it
> just the right
> depth, so that when the fitting got to the tightest point
> and you were flush
> it would work. But I'll say it again they aren't design to
> be flush like
> something that has straight threads.
>
> Also be sure to use "pipe joint compound" on the threads
> available at
> pluming supply stores made by Oatey Great White with Teflon
> (TPFE).
>
> Jerry Christopherson
> 9473187
>
>
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