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I think these issues are universal. I have a bunch of these in 1/4" and
3/8" pipe size; most are brass from Harbor Freight--automotive style are
getting harder to find--but some are steel from various brands and all
do the same thing to some extent. I think it's partly due to wear but
might be due to just plain shitty manufacturing and specs. If I
remember, I try to make/break connections before I turn the air from the
compressor on; it's easier. Maybe the 'industrial' type work better?
FWIW, I have a couple tractors with similar type of quick connects for
hydraulic lines, except larger pipe size and are designed to break away
if you start moving before disconnecting. I bought some cheap
sockets--made in you-know-where--and one of them is now failing to hold
connection (though the lines are shot and I need to try new before I
totally blame the connector).
Bob
On 7/4/2025 7:52 PM, Douglas Shook wrote:
> Hi guys,
>
> I have been using 3/8" Tru-Flate (automotive) quick connects for all
> the air hoses in my shop for decades.
>
> I have a bunch of old brass female sleeve lock couplings that require
> you to move the outer sleeve to connect and disconnect the plug. They
> are working fine after decades of use.
>
> I also have a bunch of newer plated steel Tru-flate ones that are
> push-to-connect that are supposed to be more convenient, but they are
> getting increasingly difficult to disconnect. I have one that I have
> to remove all air pressure before it will release the plug.
>
> I have purchased all of these from McMaster-Carr, they are genuine
> Tru-Flate products.
> I have tried lubricating them, but it does not seem to help.
>
> I also have tried to find new Tru-Flate connectors without the
> push-to-connect feature, but cannot locate them for 1/4" pipe and 3/8"
> coupling.
>
> Do any of you have experience with this problem? It is quite annoying
> when you want to change a tool, as you might imagine.
>
> I have seen some universal sleeve lock couplings that are supposed to
> work with Tru-Flate plugs, but I have not seen them with 1/4" pipe and
> 3/8" couplings.
>
> I am attaching a link from McMaster:
>
> https://www.mcmaster.com/products/couplings/tru-flate-quick-disconnect-hose-couplings-for-air/
>
> Thank you in advance for any help or information you may have.
>
> Best,
>
> Doug
>
>
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I think these issues are universal. I have a bunch of these in 1/4"
and 3/8" pipe size; most are brass from Harbor Freight--automotive
style are getting harder to find--but some are steel from various
brands and all do the same thing to some extent. I think it's partly
due to wear but might be due to just plain shitty manufacturing and
specs. If I remember, I try to make/break connections before I turn
the air from the compressor on; it's easier. Maybe the 'industrial'
type work better?<br>
<br>
FWIW, I have a couple tractors with similar type of quick connects
for hydraulic lines, except larger pipe size and are designed to
break away if you start moving before disconnecting. I bought some
cheap sockets--made in you-know-where--and one of them is now
failing to hold connection (though the lines are shot and I need to
try new before I totally blame the connector).<br>
<br>
Bob<br>
<br>
<div class="moz-cite-prefix">On 7/4/2025 7:52 PM, Douglas Shook
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAG1pxgYn2b_wamiTiJtsUc-pLvEzKRanviYD4QRATbXmjNS+Fg@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">
<div class="gmail_default" style="font-size:small">Hi guys,</div>
<div class="gmail_default" style="font-size:small"><br>
</div>
<div class="gmail_default" style="font-size:small">I have been
using 3/8" Tru-Flate (automotive) quick connects for all the
air hoses in my shop for decades.</div>
<div class="gmail_default" style="font-size:small"><br>
</div>
<div class="gmail_default" style="font-size:small">I have a
bunch of old brass female sleeve lock couplings that require
you to move the outer sleeve to connect and disconnect the
plug. They are working fine after decades of use.</div>
<div class="gmail_default" style="font-size:small"><br>
</div>
<div class="gmail_default" style="font-size:small">I also have a
bunch of newer plated steel Tru-flate ones that are
push-to-connect that are supposed to be more convenient, but
they are getting increasingly difficult to disconnect. I have
one that I have to remove all air pressure before it will
release the plug.</div>
<div class="gmail_default" style="font-size:small"><br>
</div>
<div class="gmail_default" style="font-size:small">I have
purchased all of these from McMaster-Carr, they are genuine
Tru-Flate products. </div>
<div class="gmail_default" style="font-size:small">I have tried
lubricating them, but it does not seem to help.</div>
<div class="gmail_default" style="font-size:small"><br>
</div>
<div class="gmail_default" style="font-size:small">I also have
tried to find new Tru-Flate connectors without the
push-to-connect feature, but cannot locate them for 1/4" pipe
and 3/8" coupling. </div>
<div class="gmail_default" style="font-size:small"><br>
</div>
<div class="gmail_default" style="font-size:small">Do any of you
have experience with this problem? It is quite annoying when
you want to change a tool, as you might imagine.</div>
<div class="gmail_default" style="font-size:small"><br>
</div>
<div class="gmail_default" style="font-size:small">I have seen
some universal sleeve lock couplings that are supposed to work
with Tru-Flate plugs, but I have not seen them with 1/4" pipe
and 3/8" couplings.</div>
<div class="gmail_default" style="font-size:small"><br>
</div>
<div class="gmail_default" style="font-size:small">I am
attaching a link from McMaster:</div>
<div class="gmail_default" style="font-size:small"><br>
</div>
<div class="gmail_default" style="font-size:small"><a
href="https://www.mcmaster.com/products/couplings/tru-flate-quick-disconnect-hose-couplings-for-air/";
moz-do-not-send="true"
class="moz-txt-link-freetext">https://www.mcmaster.com/products/couplings/tru-flate-quick-disconnect-hose-couplings-for-air/</a></div>
<div class="gmail_default" style="font-size:small"><br>
</div>
<div class="gmail_default" style="font-size:small">Thank you in
advance for any help or information you may have.</div>
<div class="gmail_default" style="font-size:small"><br>
</div>
<div class="gmail_default" style="font-size:small">Best,</div>
<div class="gmail_default" style="font-size:small"><br>
</div>
<div class="gmail_default" style="font-size:small">Doug</div>
<div class="gmail_default" style="font-size:small"><br>
</div>
<br>
</div>
</blockquote>
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