How To Correctly Measure Pipe Threads

Рет қаралды 132,820

10 жыл бұрын

Measuring pipe threads seems simple enough, but can be a bit tricky. This short How To will explain how to measure various types of pipe threads.

Пікірлер: 39

@arthurrobey4945 2 жыл бұрын

Thanks I got what I came for. A lifelong mystery solved.

@SnakeRiverFishing 6 жыл бұрын

I shall be down to the hardware store with my parts and see what screws together

@gregnorman4047 5 жыл бұрын

Nice job. Very informative and clear. Learned what I needed to know.

@juanbernal6534 Жыл бұрын

Great video quick, informative, and to the point!

@yanim9578 9 жыл бұрын

Very informative - thanks!

@robrarker 3 ай бұрын

Question, if I have three quarter inch outer diameter male threaded pipe, and I want to put a cap on it, what size female threads do I need for that to screw together , thank you very much

@Steel_the_Free 4 жыл бұрын

On the compression discussion 1:52. You measure the compression fitting where the transfer or discharge tube would fit and get 1/2" compression. Then you measure the outlet fitting and get 3/4" hence a 1/2" MPT when we subtract a 1/4".

@AirCompressorPartsOnline 4 жыл бұрын

Correct. A 1/2" compression fitting on a check valve will measure 1/2" ID, where the tube fits into it. This should match the OD measurement of the tube itself, which is 1/2" OD. The bottom (oulet) thread of the same check valve has standard male NPT threads, so you will measure the OD of the threads (3/4") then subtract 1/4" to come up with your "MPT" size, which is 1/2". So, this would be a 1/2" compression (inlet) x 1/2" MPT (outlet) check valve. Thank you for the comment and watch!

@jaydekaytv 4 жыл бұрын

Thread measurements are ridiculous - what a mess of a system. It can and should be so much more straight forward. Thx for the vid.

@AirCompressorPartsOnline 4 жыл бұрын

You're right about that. We should probably all be on one system, but that's another argument for another day :-) Thanks for watching!

@KetoJames 6 ай бұрын

How do you measure a quick connect male?

@oppenheim11238 3 жыл бұрын

thank you

@mj625 5 жыл бұрын

The video mentioned a chart that would help with this but I don't see it here or on the website. Can you help me locate it?

@AirCompressorPartsOnline 5 жыл бұрын

We made a nice, new video on just this! Just click the below link (Master Tool Repair is our sister company): kzfaq.info/get/bejne/n8yAnrp72qiun4E.html

@markus4434 6 жыл бұрын

so I measured my air compressor Guage threads, 3/8, if I subtract 1/4" that only makes it 1/8 thread? that can't be right

@AirCompressorPartsOnline 6 жыл бұрын

If the OUTSIDE diameter measurement is 3/8", then you would subtract 1/4" to arrive at 1/8", so 1/8" MPT is correct. Many air compressors use 1/8" MPT gauges, especially in the air regulator. Typically you'll see 1/4" MPT gauges but 1/8" MPT gauges are not uncommon either.

@user-kp8ps9zz4r 6 ай бұрын

Thanks bro

@conqwiztadore2213 5 жыл бұрын

God.. imperial is such a backwards way of measuring things..

@backpages1 7 жыл бұрын

A question please. I have a threaded female connector. I need to know how to measure the internal size of this connector so that I can make the correct size bolt to fit. I have used my thread gauge to measure the threads, which is 20. How do I determine what size rod I need?

@AirCompressorPartsOnline 7 жыл бұрын

What you have there is 20 TPI (Threads Per Inch) so now you need to find the correct O.D. of stock to use. To determine the bolt, you first must determine the FPT (Female Pipe Thread) size of the port you're measuring. First, I'd get a measurement of the thread (inside diameter).

@backpages1 7 жыл бұрын

(this is starting to feel like Groundhog Day) The ID of the connector threads is .58". If it's related, the outside of the connector (hex) is .74".

@AirCompressorPartsOnline 7 жыл бұрын

If you have .58" for an internal diameter, that translates into 1/4" FPT. If the outside diameter of the connector is .74", that translates into 1/2" MPT. So, you will simply need 1/2" FPT x 1/4" MPT reducer so you will be able to thread the larger male connector into the smaller female connector.

@backpages1 7 жыл бұрын

Thank you for that information. A related question that might also be of use to others who read these comments... Is the thread count in any way related to the depth of the thread? For instance, if the thread count of a female coupler is 1/4 - 20, are those threads the same depth as a coupler with 3/4 - 20 threads?

@AirCompressorPartsOnline 7 жыл бұрын

The thread count doesn't necessarily have to be related to thread pitch, no. Actually, the below link is a great reference that explains this very handily: www.boltdepot.com/fastener-information/measuring/tpiandpitch.aspx Hope this helps!

@Helikopterpop 4 жыл бұрын

I hate how the imperial and inch system complicates the hell out of everything. How hard could it possibly be to convert to metric system. You tried once but failed. What you read on the caliper is what you have to work with. How hard could that be. No fractions or dividing, just straight measures and just buy the fitting. But no, we metricheads need to learn a new measuring language just to hook up our compressor to tank. Bah! But great video! thanks

@adamhardy8690 3 жыл бұрын

Try coming to the UK its worse, we don't know where we are, I have a flexi tap tail and one end is measured in metric and the other in imperial ...ffs...nightmare trying to work out what I need as a replacement.

@robbiejk9613 Жыл бұрын

When it comes to mechanical items, the metric is indeed easier. But as far as temperature, air or water flow volumes, the metric system sucks.

@OWASIA Жыл бұрын

Benign,your work is benign. But kindly clear in details why to less 1/4".kindly elobrate

@JakeArmyRetired 5 жыл бұрын

Thank you!

@AirCompressorPartsOnline 5 жыл бұрын

You're very welcome!

@jimmymahone5420 3 жыл бұрын

Thanks a million! Maybe I can avoid earning another of those Idiot-Of-The-Week awards when I get home from Lowe's! Just call me All Thumbs ...

@AirCompressorPartsOnline 3 жыл бұрын

Glad this video helped! It can be confusing but hopefully this helped cleared it up a bit. Good luck!

@letslearnmarineengineering4607 5 жыл бұрын

Not clear, you are measuring 1 inch but speaking three quarter. How it happens?

@AirCompressorPartsOnline 5 жыл бұрын

Thank you for the comment! For male NPT threads, you would measure the OD (Outside diameter) of the threads, first. Then, subtract 1/4" form this measurement to get your "MPT" size. So, threads that measure 1" OD translates to 3/4" MPT.