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1/2" NPT Locknuts

 
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hennesse



Joined: 04 Feb 2011
Posts: 38
Location: United States: Virginia

Drinking: On Tap: Quickie ESB

Working on: Primary: Body, Body, Body IPA, 2ary: Paducah Pale Ale


PostLink    Posted: Wed Mar 16, 2011 6:02 pm    Post subject: 1/2" NPT Locknuts Reply with quote


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MoreBeer is out of the H624 locknuts. I called and they said it would be a couple of weeks. Bummer - I have all the other SS parts, coil is coiled, etc.

Kal's instructions say that the recess in the locknut partially holds the O-ring. So we have to have the correct locknut.

Any other sources? I can wait if I need to, but dang, I'm raring to go!

Dave

Crazy thoughts:

The McMaster 4464K586 1" used on the heating elements has such a recess, but it's NPSL. Doesn't NPSL stand for American Standard Straight Locknut Pipe Thread? NPT thread is tapered so it forms a seal - you can only turn it so far before the threads "jam". To be useful, a locknut might have to be turned past the "jam" point so it can lock a pipe that is turned to the jam point. Is a locknut really NPSL? Is the H624 equivalent to McMaster 4464K584 ?
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Burglar



Joined: 11 Feb 2011
Posts: 56
Location: Detroit


PostLink    Posted: Wed Mar 16, 2011 8:23 pm    Post subject: Reply with quote

I just used the McMaster nut. Mine bottomed out on the pot before it made it to where it would jam.
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crush



Joined: 28 Dec 2010
Posts: 709
Location: Telemark, Norway


PostLink    Posted: Wed Mar 16, 2011 8:28 pm    Post subject: Reply with quote

You're right that locknuts typically are straight threaded. I'm no expert here, since I only use national pipe fittings as part of my hobby, but I think the straight threads create a seal when the nut is jammed up against something else, like the kettle wall.

I ordered mine from bargainfittings - http://www.bargainfittings.com/index.php?route=product/product&path=36_39&product_id=56.
Haven't got to use them yet, so no advice.

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cardmechanic



Joined: 16 Feb 2011
Posts: 25
Location: Virginia


PostLink    Posted: Thu Mar 17, 2011 2:06 pm    Post subject: Reply with quote

I got mine off Amazon. Merit Brass M419-08 Hex.

I'd post a link but I'm not sure how to add Kal's referral info.
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kal
Forum Administrator


Joined: 12 Dec 2010
Posts: 10196
Location: Ottawa, Canada

Drinking: German Lager, Electric Hop Candy Jr, Scottish 70/-, Cali Common, Maibock, Helles, Russian Imperial Stout, Black Butte Porter

Working on: Weizen


PostLink    Posted: Thu Mar 17, 2011 2:53 pm    Post subject: Reply with quote

Here's a link:

http://www.amazon.com/gp/product/B003GXF5DU/ref=as_li_ss_tl?ie=UTF8&tag=theelectricbrewery-20&linkCode=as2&camp=1789&creative=390957&creativeASIN=B003GXF5DU

Hover over for info/pricing, click to view.

Kal

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rcrabb22



Joined: 23 Dec 2010
Posts: 461
Location: Illinois


PostLink    Posted: Mon Mar 21, 2011 12:00 pm    Post subject: Reply with quote

www.bargainfittings.com has the 1/2 locknuts plus a host of other parts.
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