Seal Nut for Male Pipe (NPTF) What'sit?

timster2 · Feb 13, 2012

I have used these on hydraulic fittings where elbows are used and just one more turn cant be done. You would line up the fitting as needed and lock down the sealing nut. O ring seal fittings have all but replaced these. You could use these as sort of a belt and suspenders approach for a loose pipe thread fitting on a irreplaceable part that you just want to seal the thread.

Artisan · Feb 13, 2012

Thanx timster...makes good sense.

Kays Supply · Feb 14, 2012

Like posted earlier, I could see putting a long thread on a pipe and threading through a bulkhead or plate. You could use a double nut to lock it to the bulkhead and then the threads at the end would be basically straight, and the lock nut you have would keep the fitting from bottoming out and not leaking.

J_J · Feb 15, 2012

"Seal-Nuts" give you positive seal on directional fittings like tees and elbows without distorting mounting bosses or damaging expensive valves and pumps.

Try this link.

http://www.jhf.com/Catalog_v6/1203.pdf

Artisan · Feb 15, 2012

J_J once again YOU DA' MAN! I don't know how you do it but you have all the answers and THANK YOU!
Yep, I bet ya there is many a man out there that if they had known about this part it would have made the lives much easier, moi' included! Now I know...

tiredguy · Feb 19, 2012

Artisan said:
Can someone eduacate me on a Seal Nut for Male Pipe (NPTF)

I understand NPT threads but this thread nut, is it an extra seal or a seal for a loose fitting or a locknut kinda deal?

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" I'm not the plumber, but I'm the plumber's son, and I can get you by until the plumber comes!" LOL! I learned that from my next older brother as we "grew up" in the plumbing & heating business as our dad was a master plumber and just like growing up on a farm and shoveling *****, we were well versed in the use of a #2 shovel digging the ditches pipe would be run in.

It's use as others have said are not to common today and has used like many have said. Many times it's use varied too. If you needed a "nipple" with long threads to say make a connection to a hydralic talk ( or water etc ) and didn't have a "welded in" coupler or nut this can be used to seal both sides of where it passes through the tank itself without leaking. Last time I used them was for putting a heating coil ( a loop of pipe ) inside the firebox of a wood fired furnace. Mane the loop out of 2 lenghts of pipe with 2 elbows and another nipple to make the "U" shaped loop. Both long pieces were threaded long and those "sealing nuts" were used on each ( inside & out ) side of the
the firebox to keep it sealed. There are many awesome hydralic fittings today that can be used of course, but the old tried and true is merely an older version that's been replaced with better technology.
Tired