PDA

View Full Version : Shot in the dark - threaded inserts...


Wager
06-02-2018, 09:46 AM
Not sure if there is anyone that can help me out or not. I have a cabinet smoker that currently has a Tel-tru thermometer in the door. I want to replace that with another thermometer but the opening of the hole in the door is 3/4” and the new thermometer is only 1/2”. I’ve looked around the net for threaded spacers that might reduce the size of the hole in the door but have no idea what I’m looking for. Any handy guys out there that might have an idea???

Stingerhook
06-02-2018, 09:50 AM
Something like this?
https://www.homedepot.com/b/Hardware-Fasteners-Nuts-Rod-Coupling-Nuts/1/N-5yc1vZc2glZ1z141lb

jdolor
06-02-2018, 10:14 AM
You might be able to use one of these -

https://www.homedepot.com/p/3-4-in-x-1-2-in-Rigid-Reducer-Bushing-91321/100206997

Wager
06-02-2018, 10:21 AM
You might be able to use one of these -

https://www.homedepot.com/p/3-4-in-x-1-2-in-Rigid-Reducer-Bushing-91321/100206997

Thatís what Iím looking for. Iíll give that a shot and see if the threads match up. Thanks guys

Nuco59
06-02-2018, 10:24 AM
If I'm not mistaken- thermos use pipe threads. Are you using a ruler to take your measurements? 1/2" NPT is a bit over 3/4" across 1/4 NPT is a bout 1/2" across.

sounds like you are trying to replace a 1/2" npt (pretty standard) with a smaller 1/4" npt.

If you are want to to thread it (not sure why you'd want to instead of just using a through hole) you could find a Male 1/2npt x 1/4fpt pipe reducer.

SmittyJonz
06-02-2018, 11:05 AM
If I'm not mistaken- thermos use pipe threads. Are you using a ruler to take your measurements? 1/2" NPT is a bit over 3/4" across 1/4 NPT is a bout 1/2" across.

sounds like you are trying to replace a 1/2" npt (pretty standard) with a smaller 1/4" npt.

If you are want to to thread it (not sure why you'd want to instead of just using a through hole) you could find a Male 1/2npt x 1/4fpt pipe reducer.

This.^^^ where are you getting these measurments? Most thermos are 1/2" NPT which require a 3/4-7/8" Hole.......

https://www.teltru.com/s-133-thermometer-installation-kit.aspx

dadsr4
06-02-2018, 11:15 AM
If I'm not mistaken- thermos use pipe threads. Are you using a ruler to take your measurements? 1/2" NPT is a bit over 3/4" across 1/4 NPT is a bout 1/2" across.

sounds like you are trying to replace a 1/2" npt (pretty standard) with a smaller 1/4" npt.

If you are want to to thread it (not sure why you'd want to instead of just using a through hole) you could find a Male 1/2npt x 1/4fpt pipe reducer.
jdolor's link is for electrical conduit, which is NPT, so it should work.

Nuco59
06-02-2018, 11:22 AM
Not exactly. electrical threads are STRAIGHT... pipe threads TAPER - but they are close and might be sorta interchangeable in a pinch.

You still need to know what you are looking for :grin:

hey- I'm just trying to help.

dadsr4
06-02-2018, 11:59 AM
3/4" Male x 1/2" Female Thread Reducer
You should be able to find one locally, but might have to go to a real plumbing supply.

https://www.amazon.com/SuperWhole-Female-Reducer-Bushing-Fitting/dp/B00PK00H6C

Joe Black
06-02-2018, 12:47 PM
Lowe,s and Home Depot have tons of bushings. It’s a very common item. If this job is not comfortable for you, take both therms with you and someone there will help you.

Wager
06-02-2018, 02:17 PM
If I'm not mistaken- thermos use pipe threads. Are you using a ruler to take your measurements? 1/2" NPT is a bit over 3/4" across 1/4 NPT is a bout 1/2" across.

sounds like you are trying to replace a 1/2" npt (pretty standard) with a smaller 1/4" npt.

If you are want to to thread it (not sure why you'd want to instead of just using a through hole) you could find a Male 1/2npt x 1/4fpt pipe reducer.

You are correct. Got the pipe fitting and Iím all set. Thanks again guys!

SmittyJonz
06-02-2018, 04:13 PM
What thermometer has 1/4” NPT threads.?

dadsr4
06-02-2018, 04:33 PM
What thermometer has 1/4Ē NPT threads.?
"the new thermometer is only 1/2Ē."

Nuco59
06-02-2018, 05:33 PM
I'm not too familiar with anilog bbq thermos- but I thought they were all pretty much 1/2" npt. I know using a ruler to figure out pipe threads might lead you astray.

I ordered a slew of pneu quick couplings/fittings for our plant engineer. He used a ruler, turned in the list and *I* ordered them wrong :grin:

Wager
06-02-2018, 10:24 PM
What thermometer has 1/4Ē NPT threads.?

I was using a pair of calipers to measure and the tel-tru was 3/4 and the new probe, which goes to a fireboard, measured at 1/2. Not sure why but the reducer/spacer that fit was 1/2 to 1/4. No clue how they measure those things.

SmittyJonz
06-02-2018, 11:22 PM
Pipe thread is measured ID of the fittings hole - 1/4” plus wall of the fitting =1/2”...........

I would of keep the teltru and made a new hole for fireboard probe

Wager
06-03-2018, 06:29 AM
I would of keep the teltru and made a new hole for fireboard probe

If I had the tools to cut through the smoker I might have thought about it but since it is simple to unscrew the tel-tru and simply screw in the fireboard probe it makes more sense for me to avoid the expense (and likely disaster if I did it myself) putting another hole in the smoker.