Goomer
Member
What are the size/specs/dimensions for the O-rings found inside a standard 1/4 inch female brass quick-connect coupler, and the more elusive, 1/8 size quick-connect couplers.
QC O-Ring specs
- Thread starter Goomer
- Start date
GeneMiller
Member
Frank I don't know the sizes but I buy a kit of random sizes for a/c units and I've almost always found a fit. They do eventually dry out but they take the heat and chemicals better than anything I've ever tried. I also have two boxes I got off of eBay that are standard and metric sizes. Those are nitrile rubber and occasionally one of those will work. They are cheap enough to have around but they have a lot of sizes that I'll never use.
http://pages.ebay.com/link/?nav=item.view&alt=web&id=140792825158
Gene
http://pages.ebay.com/link/?nav=item.view&alt=web&id=140792825158
Gene
dgardner
Moderator
The Parker part number for 1/8 is: 50001-013-0010 and 1/4 is: 50001-015-0010. The standard ones are nitrile. Parker doesn't seem to publish dimensions for them though so I didn't really answer your question I guess......
Larry Cobb
Member
We carry them in Viton . . .
for better heat and chemical resistance . . .
http://www.cobbcarpet.com/zen/index...rch_in_description=1&keyword=DA2015+or+DA2013
for better heat and chemical resistance . . .
http://www.cobbcarpet.com/zen/index...rch_in_description=1&keyword=DA2015+or+DA2013
GeneMiller
Member
Larry I've bough them from my supplier in viton and they never last as long. The a/c one last way longer for me. It is possible the supposed viton really is just rubber. They used to be all brown orings and worked well but the last time they were black. Different quality viton I'm sure or just rubber.. The great thing about the green ones is the quality is always the same.
Gene
Gene
https://www.zatkoff.com/
This place is local to me. I have bought o-rings from them many times. From what I understand, Viton O-rings are for oil applications. They will have anything you need.
This place is local to me. I have bought o-rings from them many times. From what I understand, Viton O-rings are for oil applications. They will have anything you need.
Larry Cobb
Member
Gene ;
O'Rings also come in different durometers (hardness) and compounds.
Some Viton O'Rings are Green in color . . .
I think the ones you got were a special type of Nitrile . . .
O'Rings also come in different durometers (hardness) and compounds.
Some Viton O'Rings are Green in color . . .
I think the ones you got were a special type of Nitrile . . .
dgardner
Moderator
The green o rings used in a/c systems are indeed hydrogenated nitrile, made to resist attack from ATF, refrigerants, and petroleum oils. I imagine they would do fine in our aqueous solutions.
dgardner
Moderator
Viton is known for its good high-temperature and chemical resistance, it is used for oxygenated fuels and ethanol/gasoline blends. It is not recommended where low temperature flexibility is required - something to consider for folks who live in Minnesota and like to plug in their QC's in below-zero weather....... 
GeneMiller
Member
I realize that Larry that's why I qualified my statement. Yours could definitely be better than what I was getting originally. They weren't lasting so I needed something better. The a/c orings were a fluke. I had them for a/c work and one was an exact match so I tried it. I completely forgot it was in there until another original oring failed. Everything has them now. They rarely fail from tearing but they do eventually dry out and shrink but it takes a long time. I came to the conclusion that they have to be consistent because the industry requires it. On the other side we have no such requirement and if it fits it will work at least for a while. Who makes sure they are being made correctly
Nobody Remember the Chinese drywall.
Dan, I don't doubt your info except they are for a/c systems which are cold by nature and in cars all over the U.S. Direct exposure may cause a problem that the sealed a/c system solves. I'll stick with them until I find something better. It's always hot here even during our supposed winter. Cold will never be an issue. I have some buna nitrile but none of those fit so I couldn't test them.
Gene
Nobody Remember the Chinese drywall. Dan, I don't doubt your info except they are for a/c systems which are cold by nature and in cars all over the U.S. Direct exposure may cause a problem that the sealed a/c system solves. I'll stick with them until I find something better. It's always hot here even during our supposed winter. Cold will never be an issue. I have some buna nitrile but none of those fit so I couldn't test them.
Gene
dgardner
Moderator
Gene, I was just reporting what one manufacturer said - I doubt the temps we encounter are what they would consider "cold". My cold comment was kinda tongue-in-cheek...
