Oklahoma Joe's Longhorn Thermometer Port Size

Discussion in 'Wood Smokers' started by bowingo, Mar 17, 2013.

  1. bowingo

    bowingo Newbie

    Can anyone tell me what size and thread the thermometer port on an Oklahoma Joe's Longhorn smoker is?

    I purchased two new thermometer's from River Country in 1/2" NPT assuming this was the size that I needed, but I was wrong (and we all know what happens when we assume, right?).  As it seems that 1/2" NPT is the most common size and the quality thermometer manufacturers (including Tel-Tru) seem to treat this size as standard, I'm thinking of either drilling out and tapping the thermometer port to 1/2" NPT threads or installing a thread adapter similar to this one.  The latter option is the one that requires me to figure out what size and thread the port currently has.

    Can anyone help me out with this?

  2. cromag

    cromag Smoking Fanatic

    I am in the same situation... I found out today the 2 ports on the OK Longhorn is 3/4 inch and I was thinking about drilling a hole lower on the door per the instructions that came with my replacement thermometers
  3. cromag

    cromag Smoking Fanatic

    Thank you for contacting Char-Broil.  The thread dimensions is 1/2-14 NPT (NPT stands for National Pipe Thread, a US standard for tapered pipe threads.

    We appreciate your business.  If you have any further questions you may contact us by either visitingwww.charbroil.com  or by phone at 1-800-241-7548.  Our hours of operation are 8am to 6pm EST Monday through Friday and 10am to 3pm on Saturdays.


    Char-Broil Grill Service Specialist
  4. bowingo

    bowingo Newbie

    Thanks, cromag. I find it odd that my 1/2" NPT thermometers don't fit. I'll have to look into this a bit more. I appreciate you posting the reply from Char-Broil.
  5. cromag

    cromag Smoking Fanatic

    I took my new thermos and the cheapo charbroil one to a shop and they did they they were both 1/2 NPT but the charbroil one is a finer thread that they never see. I have just decided to drill new holes and install them and use the original thermo ports to run the wires for my meat thermometers 
  6. cromag

    cromag Smoking Fanatic

    BoWingo I just went to Lowes and purchased a 7/8 inch Lenox metal hole drill bit and just installed them on the lid. The threads are different and Fastenal had nothing to make the new thermos work in the original ports

    Last edited: Mar 25, 2013
    remmy700p likes this.
  7. Did you have to make a thread on the holes you drilled or do the thermometers take care of that as they go in?  Thanks!
  8. wichita chief

    wichita chief Fire Starter

    On my Longhorn I used standard Tel-Tru thermometers with no problems. They are 1/2"
  9. That's where you want your CC thermos positioned anyway.
  10. Has anyone who used the Horizon 20" convection plate mod on the Oklahoma Joe had any problems with it causing the two grates in the smoke chamber to not fit down level anymore??  It looks like I may have to shave off a grate line or two to make it work with it in there...?  Any feedback would be appreciated! 

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