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Air Hose Quick Connect Fitting Options, Adapter, or Conversion

bushmechanic

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Mar 17, 2014
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I've got a bit of an issue. I have a threaded hole that appears to be 5/16X24.

It may be some oddball pipe thread, but I can get a nut of that thread type on it regardless. Don't know if it would seal, but maybe someone knows what thread this is.

Either way, that's not the point of this post, in the end.

As illustrated in the picture I've included, I currently have what appears to be a Nitto standard male plug. This is the unit that is currently installed, and features that thread count. It's also a bit extended, as you can see. That does matter a bit.

Right beside it in the picture is what I want to go in there. Either this, or some other readily available connector standard. Something that can attach to most any coupler you're likely to find. Doesn't matter what it is, so long as I can go to a parts or hardware store and buy a hose that will snap on.

Now, there are a few ways this might be possible.

1: Perhaps someone makes a fitting that is normal in this nation that will indeed thread into that hole.

2: Maybe there exists an adapter of some variety that will accept the female threads of the commonplace fitting, and end in the male threads of that Nitto fitting.

3: Someone might be manufacturing a Nitto-to-whatever I want adapter.

I'm at a loss. Right now, it appears I'm going to have to use the hole tapped for what seems to be 5/16X24. If that's a pipe thread, I'd sure like to know.

The problem, however, is I don't know what in the immortal hell I'm supposed to be looking for.

I need that tapped hole to end in a male fitting that is compatible with common couplers somehow; not that Nitto stuff.

If I haven't been clear in some area, please let me know.
 

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bushmechanic

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I've poured through catalogs, and I still can't find an Industrial or Automotive connector that will thread into that hole.
 

swflge8

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Did you go to your local hardware shops to see if anyone can match it up? Also try some automotive store(ie Carquest, pepboys)


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bushmechanic

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Did you go to your local hardware shops to see if anyone can match it up? Also try some automotive store(ie Carquest, pepboys)


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Yeah, nobody in this area knows any more about this stuff than I do, unfortunately.

This is a strange situation. I might look into machining something if it's cost-effective and I can't find something on the open market.

I contacted the factory to see if they have an option, but they aren't open now. It will be a while before they can go through their capabilities and suppliers.

I'm going to need a bunch of these solutions; whatever form they may take.

The base design of the assembly may have to be altered, but for now, I want to work with what I've got, and there isn't enough room to drill and tap it for anything other than the thread size I specified.
 

swflge8

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Wow that's so weird, I would think Grainger or some type of company like that could help you out. I'll check around on line to see if I can help, if I do I'll post a link


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Dragoonmc

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It appears that the other end of that piece is an automotive spec 1/2" quick connect. Might be easiest to just adapt that to the industrial quick connect pictured below it
 

Advan

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There is a metric taper thread in M8x1, as mentioned previously. 1/16x27npt is the "closest" US taper thread. What you currently have is obviously in Nittos "high coupla" pattern, but that long shank is definitely strange. I would just buy a 1/4" npt tap and make the threads you want... ;)
 
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bigfunwmu

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5/16-24 is an -2 SAE hydraulic fitting thread size

Probably be closer to tap it out to 1/8 NPT than 1/4
 
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The Cobbler

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It looks like that fitting seats into the tool causing the seal rather than the threads doing the sealing. If it was me, I'd be tempted to cut the plug off & weld on the pc that you want to use. or find someone with a lathe & maybe have them make you plugs .
 
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bushmechanic

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Yeah, just what exactly is it that you borrowed from work and want to use at home?????;) It would probably help us help you!

LOL

I'm developing a product with a factory, and what they can ship isn't always what I want in some areas. Some things need to be modified here.

If it's screw-in/screw-out, or clamp-on, I can get it done.

I can't be tapping everything that comes through, unfortunately. I wish I could, but it's just not going to happen. That's why I'm working with a factory.

In this particular event, the assembly is largely acceptable; so much so, in fact, that this stupid little issue is infuriating.
 
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bushmechanic

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Fitting to get from that thread you have to the female pipe you need to screw into your air fitting below.

Part number Y-6405-02-04-O Even has the o-ring on it to seal at the base of the threads.

http://www.fittingsunlimited.com/Pr...66&SCID=2&PID=4342&pimage=Y-6405-O.jpg&mid=11

Wow. :thumbup:

I don't know how the heck you found that. Can't seem to get that site to work, but I have found the item with your part number.

Thanks! I'm still waiting to hear whether or not the factory has a one-piece solution hanging around, but if they don't, I can certainly break off the time to install these adapters.

I'll call around to see if I can buy them for less than a million bucks a piece. One place wanted darn near $90, and it didn't reduce with a larger order. LOL

The site you linked lists them cheaper. I'll call them on Monday. I need a few to test for now, and then I'd be placing an order for 100.

Edit: Now that I know the terminology, I've been able to locate a number of similar connectors. This has been a massive help.

If anyone can find alternate solutions, I'd be interested in hearing about those, as well. One can never have too many options. ;)
 
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bushmechanic

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I went down to a Parker distributor and I believe I ordered those parts. It's hard to tell, given the seemingly limited nature of the lone occupant of the building.

For a man surrounded by bins of threaded fittings, he sure didn't seem to know much about threads; or fittings, for that matter.

Regardless, I paid a whopping $22.00 a piece for the things, and had to order five of them. :shocking:

Yeah, it's a small quantity order, and I needed a few of them anyway, but still. If I can't get them cheaper than that, I'll have to make the overseas factory re-design the assembly. The maximum this design can bear is about $10. Any more than that, and I'm just having a new part designed and fitted.

Some people seem to want near $80 for them...

There's got to be a cheaper solution. On to international suppliers, I suppose. It has to exist already.
 
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