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Weld Spud, NPT Thread
Weld Spud, NPT Thread

Our Price: $5.00

Product Code: SPUD

Thread Size*:

304 Stainless Steel "welding spud" fitting. We know... this thing has a funny name and most people have never heard of these parts unless you're in the business of industrial tank welding. In a nutshell, welding spuds are an alternative to NPT half couplings. They have a nice flanged surface area where they attach to your tanks/vessels and present NPT threads to only one side in a very low profile.

We picked these up in several sizes for accommodation of anything from our SL sight kits, dial thermometers, etc. If you are having ports welded in for single-sided thread-in accessories, these are sweet. We also think these are great for silver soldering due to how much surface area there is for good adhesion.

BEWARE: some customers buy these for their drain bulkheads and are disappointed to find that they can only thread something in from the outside. To be very clear, these have NPT (tapered thread) with the larger thread on the exterior (which is why we compare these to half couplings). It allows any male NPT fitting to be threaded in from the outside only. For example, an NPT threaded nipple will thread in about 3 turns and that nipple will NOT be sticking out on the interior of your vessel.

While SOME electric heating elements (with 1" NPS straight thread) will thread into the 1" NPT spuds, this varies from manufacturing lot to lot. The elements we offer on this site does not currently thread into the spuds enough to make gasket contact. We HIGHLY recommend using the EWL3 or ETC4 style element install components. If you really want to solder or weld a threaded port for a plain unenclosed element, a 1" locknut with the oring groove facing out would be the next best solution.

Size Options as chosen in the dropdown menu.
  1. 1/4" NPT for use with the SL sight kit or T24 dial thermometers.
  2. 1/2" NPT for use with LTS sight kits or T325/T36 dial thermometers. These should also work for solder/weld-in bottom drains on kegs. The back side of the spud has a bump-out or indexing boss that will fit into the hole you drill in your vessel. The OD of the boss is just over 1" so a 1.064 or 1.125" diameter hole is ideal. For the decimally challenged, that's 1-1/16" to 1-1/8".
  3. 1" NPT for use with your own thread-in heating elements. The threads are NPT but a 1" NPS heating element has shown to thread in far enough to make gasket contact (on the few elements we've tested). Some customers have found elements from various sources that have oversized threads that do not go all the way into these spuds but we have no way of knowing which are problematic specifically (we do know that the elements we sell do not thread all the way in). You can either use my silicone oring found on the accessories page or the stock heating element gasket would work also. The indexing boss or back bump out on this size spud will require a 1.564 (1-9/16") hole minimum, up through 1.625 (1-5/8"). The alternative to this large hole would be to grind the boss off of the spud and go with a 1-3/8" hole. It would then surface mount either by welding or silver soldering.

Average Rating: Average Rating: 5 of 5 5 of 5 Total Reviews: 12 Click Here to Write a Review »

  0 of 0 people found the following review helpful:
5 of 5 Worked Well With Camco 02932 October 25, 2019
Reviewer: The Infamous El Guapo from TN United States  
Used this on stainless steel 1/2 barrel. Works well with the Camco ULWD 5500 watt 240 VAC element. Threaded right down to seat the gasket. Glad I bought four of these because I got plans for the other three now :)

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  1 of 1 people found the following review helpful:
5 of 5 Great product April 23, 2017
Reviewer: Pete Gould from Westlake, OH United States  
Nice easy way to add a thermometer to your kettle.   Bobby does a good job with showing how to silver solder if you've never done it before.    The best ways to make a hole in your kettle would be a hole  saw or harbor freight has a great knock out punch set you could use.   Personally, I prefer the punch sets as they will last longer than a hole saw.

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  0 of 0 people found the following review helpful:
5 of 5 Welding spud April 19, 2017
Reviewer: Shelby Smith from Covington, LA United States  
Brew Hardware has the best prices and fastest delivery of any online store I have ever used and I use a lot. I'm really happy with these guys.

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  0 of 0 people found the following review helpful:
5 of 5 Great quality March 17, 2017
Reviewer: RJ from Aliso Viejo, CA United States  
Installing these takes a bit of finesse, especially on small radius pot walls, but once you get the hang of it, no problems.  I got 3-4  full threads engaged with several different male NPT fittings.  Well made.

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  0 of 0 people found the following review helpful:
5 of 5 Great service March 21, 2016
Reviewer: Andrew  
Great products and great service. I emailed the team after placing my order to add something and they had no issues accommodating my request. Will definitely continue buying from here!

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