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idkfa 10-14-2012 01:45 PM

QDs on McMaster-Carr, Help
I have never used McMaster-Carr before, can I get some help on selecting a paintball quick disconnect?

It looks like a High-Flow Hose Coupling in 1/4 is what I need. Does it matter what material I choose?

Thanks in advance.

the_chemist 10-14-2012 02:18 PM

Most paintball fittings are 1/8 NPT

idkfa 10-14-2012 02:37 PM

I thought the 1/8" referred to the hose inner diameter, not the fitting size? The fitting should be 1/4"?

wrongbloke 10-14-2012 02:49 PM

Pretty sure the fitting needs to be 1/8. Which particular piece are you looking at right now?

idkfa 10-14-2012 02:57 PM


I know that "1/8 NPT" is the common terminology in paintball, I just want to be sure that it actually refers to the correct fitting size.

If that is the case, and I should be looking for 1/8" NPT, there seem to be few, if any, offered on McMaster-Carr.

idkfa 10-14-2012 03:02 PM

These look to be the right size, but the pressure rating seems to be too low.

LilShank 10-14-2012 03:39 PM

1/8" NPT, from what I understand, refers to the threading of the fitting themselves, not the size of the hose.

idkfa 10-14-2012 03:53 PM

A 1/8" NPT fitting is 3/8" in DIA.

I just wanted to confirm what they were referencing with their sizing.


Originally Posted by idkfa (Post 2504167)
These look to be the right size, but the pressure rating seems to be too low.

Product # 95815K41 on page 303 of the catalogue look to be what I need, but as I said before, they are only good to 300 psi.

y0da900 10-14-2012 08:55 PM


That should bring you to the page with the 1/8" NPT fittings that are rated 1,00 psi and above. But hotlinking to their site sucks sometimes, so if it doesn't - use the menu on the left to select 1/8 for pipe size, and 1,000 psi and above for pressure rating. Their options for narrowing your search field always appear in the toolbar to the left, and are generally quite useful. If it isn't appearing when you go there, hover over the left side and your cursor should change to a hand - click there and it should pop up.

Chooie 10-14-2012 09:20 PM

May I suggest looking at the Pro Connect if this is something you will want to disconnect while pressurized.

Psiworx Pro-Connect III (Quick-Disconnect & Air Release System) - Lowest price available from

I've converted all of my remote lines over to Pro Connect IIIs and am very happy with them. Otherwise, yeah, 1/8" NPT is what you want. Make sure you get the hardened fitting so they don't deform from the ball bearings in the female QD.

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