The price is good and when manufactured correctly, these work very nicely; that is, if you have the right style of male plug end!
I initially purchased three. I found a big wad of curled brass machining chips inside one of mine, completely engulfing the spring. Would have been bad news if some of those chips got into my air tools! Too bad I can't post my picture of it.
I'd say QC (quality control) is sorely lacking (seeing as how others received parts without threads). All three of mine work fine, NOW. I pulled the other two off (after having already installed them on my new air system) and inspected and tested them.
I've ordered two more. We'll see how that goes. (they turned out to be fine)
BTW, regarding what fits and connects and what doesn't: I may be "old school" but in the past I was used to looking for "M" style couplers. Now they seem to be called "Industrial Interchange" (as in universally interchangeable). Of my dozen or so plugs (male ends) only one is oddball and about a 1/16" short in the largest diameter area. If you do not have a shoulder on the plug close enough to the end it will not push on the tip of the coupling enough and will not latch into them and stay on. These plugs without the correct shoulder, like built-in plugs in SWIVELS FOR AIR TOOLS, will only work with my "old school" air couplers and other styles of quick-disconnect couplers! My old air blow gun like this (http://www.amazon.com/Forney-75334-Pocket-Industrial-Adjustable/dp/B003X5S4E8/ref=sr_1_2?s=hi&ie=UTF8&qid=1446114592&sr=1-2&keywords=Air+gun+twist) will not work, either. This is a PIA, because I have to keep special hoses around for my air tools with swivels. I believe the Dixon DC style of quick-coupler does not rely on the end being pressed in. THESE DIXON DCB STYLE OF COUPLERS ARE BEST FOR STATIONARY APPLICATIONS, where you plug in your hoses into them.
This guide is helpful: http://www.legacymfg.com/Selection_Guide_to_Couplers_Plugs.pdf
Whereas most of us are using the 1/4" size (where the tip of the male plug part is a nominal 5/16" or .312-.320") some may be accidentally buying a 3/8" female version of the coupler and the normal, 1/4" male plugs just slop around loosely in it.
The price is good and when manufactured correctly, these work very nicely; that is, if you have the right style of male plug end! I initially purchased three. I found a big wad of curled brass machining chips inside one of mine, completely engulfing the spring. Would have been bad news if some of those chips got into my air tools! Too bad I can't post my picture of it. I'd say QC (quality control) is sorely lacking (seeing as how others received parts without threads). All three of mine work fine, NOW. I pulled the other two off (after having already installed them on my new air system) and inspected and tested them. I've ordered two more. We'll see how that goes. (they turned out to be fine)
BTW, regarding what fits and connects and what doesn't: I may be "old school" but in the past I was used to looking for "M" style couplers. Now they seem to be called "Industrial Interchange" (as in universally interchangeable). Of my dozen or so plugs (male ends) only one is oddball and about a 1/16" short in the largest diameter area. If you do not have a shoulder on the plug close enough to the end it will not push on the tip of the coupling enough and will not latch into them and stay on. These plugs without the correct shoulder, like built-in plugs in SWIVELS FOR AIR TOOLS, will only work with my "old school" air couplers and other styles of quick-disconnect couplers! My old air blow gun like this (http://www. amazon. com/Forney-75334-Pocket-Industrial-Adjustable/dp/B003X5S4E8/ref=sr_1_2? s=hi&ie=UTF8&qid=1446114592&sr=1-2&keywords=Air+gun+twist) will not work, either. This is a PIA, because I have to keep special hoses around for my air tools with swivels. I believe the Dixon DC style of quick-coupler does not rely on the end being pressed in. THESE DIXON DCB STYLE OF COUPLERS ARE BEST FOR STATIONARY APPLICATIONS, where you plug in your hoses into them. This guide is helpful: http://www. legacymfg. com/Selection_Guide_to_Couplers_Plugs. pdf
Whereas most of us are using the 1/4" size (where the tip of the male plug part is a nominal 5/16" or. 312-. 320") some may be accidentally buying a 3/8" female version of the coupler and the normal, 1/4" male plugs just slop around loosely in it.