McMaster Keg O-Ring List

[argentcorvid]

some internal o-rings for sanke couplers:

Perlick Mk-1 needs 3x #117 for the ID of the coupler body (this may be the same for newer Perlicks)
Taprite "wing" style needs 1x #118 for the coupler body and 2x #115 for the probe.

I also have a coupler which I do not know the brand of (has an "O" stamped in the body). It is similar to the Taprite wing handle, except it has more of a "wheel" handle to operate it. It used the same o-rings as the Taprite wing handle.

 

[BcuzIminUT]

PIN LOCK POST O-RING SOLVED!!!

Okay, sorry for the yelling above, but I wanted to get your attention. After I switched my gas lines to reinforced lines and beer lines to 3/16” BevSeal (no more beer tasting like water from a garden hose), I developed frequent gas leaks and occasional beer leaks. The reinforced gas lines and BevSeal are much stiffer than the beer/gas lines most use, which caused the fitting to torque and twist. After losing several tanks of CO2, reading this entire post several times and many other posts, I decided to take a hit for the team. Here is what tried:

No. 1. -112 BUNA
No. 2. -112 Silicone
No. 3. 10mm (ID) X 16mm (OD) X 3mm (Diameter) Silicone
No. 4. 12mm (ID) X 17mm (OD) X 2.5mm (Diameter) Silicone
No. 5. 12mm (ID) X 18mm (OD) X 3mm (Diameter) Silicone
No. 6. 10mm (ID) X 17mm (OD) X 3.5mm (Diameter) Silicone

I decided to go with 10mm (ID) X 16mm (OD) X 3mm (Diameter) Silicone for the beer post and 12mm (ID) X 18mm (OD) X 3mm (Diameter) Silicone for the gas post. The inside diameter of Nos. 1 & 2 were too big. The 2.5mm diameter of No. 4 was too small for the groove, and I did not get a snug connection. The 3.5mm diameter of No. 6 was just too thick to fit in the groove.

No. 3 works well on the beer post; it takes a little stretching, but is nice and snug. No. 5 on the gas post is downright tight and takes a little wiggling to get it off. It may be too tight for some. I did not try 11mm (ID) X 17mm (OD) X 3mm (Diameter) Silicone because I could not find them in small quantities, but it is right between the two and may be just right. I also don’t know how well BUNA would work. It seems less stretchy to me and might make No. 3 too hard to get on the post and No. 5 too hard to get the connector on post. I’ll leave it someone else to try BUNA and 11mm (ID) X 17mm (OD) X 3mm (Diameter) Silicone.

I ordered small quantities on Amazon from here:
http://www.amazon.com/dp/B008MKXQ9M/?tag=skimlinks_replacement-20 (10 pcs. for $3.49 - 10mm (ID) X 16mm (OD) X 3mm (Diameter) Silicone)
http://www.amazon.com/dp/B008ASY3Y8/?tag=skimlinks_replacement-20 (10 pcs. for $3.47 - 12mm (ID) X 18mm (OD) X 3mm (Diameter) Silicone)
Larger quantities (and the 11x17x3 in silicone) can be purchased at http://www.oringsandmore.com/.

I welcome others to carry the torch from here and post their results. I’ve also attached a few photos.
No. 5 is on the left, a BUNA -111 (agreed ball lock size) in the middle, and No 3 on the right.

 

[Veedo]

Thanks for this. The #5 is tight on the beer post, but would it work ok? Would be nice for folks to just stick with one o ring if possible.

 

[fifelee]

Thanks for the info.
For both the pin lock gas and beer posts I have been using the 10mm (ID) X 16mm (OD) X 3mm (W) for over a year. They work great.

https://www.homebrewtalk.com/f11/mcmaster-keg-o-ring-list-233086/index7.html#post4197250

 

[Diver_Alan]

Thanks to the OP. This is great information.

 

[alanburtonwells]

Pin Lock O-Ring Update

I will attempt to use the 10mm (ID) X 16mm (OD) X 3mm (Diameter) BUNA (70 Duro) o-ring.

I ordered a 50 pack from http://www.oringsandmore.com/metric-buna-orings-10-x-3mm-price-for-50-pcs/ for $3.50 (total was $6.25 including first class USPS shipping)

I will let you guys know how these work as soon as they arrive and I have time to test them out!

 

[brettwasbtd]

PIN LOCK POST O-RING SOLVED!!!

Okay, sorry for the yelling above, but I wanted to get your attention. After I switched my gas lines to reinforced lines and beer lines to 3/16” BevSeal (no more beer tasting like water from a garden hose), I developed frequent gas leaks and occasional beer leaks. The reinforced gas lines and BevSeal are much stiffer than the beer/gas lines most use, which caused the fitting to torque and twist. After losing several tanks of CO2, reading this entire post several times and many other posts, I decided to take a hit for the team. Here is what tried:

No. 1. -112 BUNA
No. 2. -112 Silicone
No. 3. 10mm (ID) X 16mm (OD) X 3mm (Diameter) Silicone
No. 4. 12mm (ID) X 17mm (OD) X 2.5mm (Diameter) Silicone
No. 5. 12mm (ID) X 18mm (OD) X 3mm (Diameter) Silicone
No. 6. 10mm (ID) X 17mm (OD) X 3.5mm (Diameter) Silicone

I decided to go with 10mm (ID) X 16mm (OD) X 3mm (Diameter) Silicone for the beer post and 12mm (ID) X 18mm (OD) X 3mm (Diameter) Silicone for the gas post. The inside diameter of Nos. 1 & 2 were too big. The 2.5mm diameter of No. 4 was too small for the groove, and I did not get a snug connection. The 3.5mm diameter of No. 6 was just too thick to fit in the groove.

No. 3 works well on the beer post; it takes a little stretching, but is nice and snug. No. 5 on the gas post is downright tight and takes a little wiggling to get it off. It may be too tight for some. I did not try 11mm (ID) X 17mm (OD) X 3mm (Diameter) Silicone because I could not find them in small quantities, but it is right between the two and may be just right. I also don’t know how well BUNA would work. It seems less stretchy to me and might make No. 3 too hard to get on the post and No. 5 too hard to get the connector on post. I’ll leave it someone else to try BUNA and 11mm (ID) X 17mm (OD) X 3mm (Diameter) Silicone.

I ordered small quantities on Amazon from here:
http://www.amazon.com/dp/B008MKXQ9M/?tag=skimlinks_replacement-20 (10 pcs. for $3.49 - 10mm (ID) X 16mm (OD) X 3mm (Diameter) Silicone)
http://www.amazon.com/dp/B008ASY3Y8/?tag=skimlinks_replacement-20 (10 pcs. for $3.47 - 12mm (ID) X 18mm (OD) X 3mm (Diameter) Silicone)
Larger quantities (and the 11x17x3 in silicone) can be purchased at http://www.oringsandmore.com/.

I welcome others to carry the torch from here and post their results. I’ve also attached a few photos.
No. 5 is on the left, a BUNA -111 (agreed ball lock size) in the middle, and No 3 on the right.

This is great! I have pin locks and original purchased the 112 for the gas posts- they are a little loose but they seem to be working for me. Next time I buy I will use your guidance.

 

[dmaxweb]

10mm (ID) X 16mm (OD) X 3mm (Diameter) Buna-N available at Grainger

https://www.grainger.com/product/O-Ring-1CTC8

 

[dmaxweb]

PIN LOCK POST O-RING SOLVED!!!

Okay, sorry for the yelling above, but I wanted to get your attention. After I switched my gas lines to reinforced lines and beer lines to 3/16” BevSeal (no more beer tasting like water from a garden hose), I developed frequent gas leaks and occasional beer leaks. The reinforced gas lines and BevSeal are much stiffer than the beer/gas lines most use, which caused the fitting to torque and twist. After losing several tanks of CO2, reading this entire post several times and many other posts, I decided to take a hit for the team. Here is what tried:

No. 1. -112 BUNA
No. 2. -112 Silicone
No. 3. 10mm (ID) X 16mm (OD) X 3mm (Diameter) Silicone
No. 4. 12mm (ID) X 17mm (OD) X 2.5mm (Diameter) Silicone
No. 5. 12mm (ID) X 18mm (OD) X 3mm (Diameter) Silicone
No. 6. 10mm (ID) X 17mm (OD) X 3.5mm (Diameter) Silicone

I decided to go with 10mm (ID) X 16mm (OD) X 3mm (Diameter) Silicone for the beer post and 12mm (ID) X 18mm (OD) X 3mm (Diameter) Silicone for the gas post. The inside diameter of Nos. 1 & 2 were too big. The 2.5mm diameter of No. 4 was too small for the groove, and I did not get a snug connection. The 3.5mm diameter of No. 6 was just too thick to fit in the groove.

No. 3 works well on the beer post; it takes a little stretching, but is nice and snug. No. 5 on the gas post is downright tight and takes a little wiggling to get it off. It may be too tight for some. I did not try 11mm (ID) X 17mm (OD) X 3mm (Diameter) Silicone because I could not find them in small quantities, but it is right between the two and may be just right. I also don’t know how well BUNA would work. It seems less stretchy to me and might make No. 3 too hard to get on the post and No. 5 too hard to get the connector on post. I’ll leave it someone else to try BUNA and 11mm (ID) X 17mm (OD) X 3mm (Diameter) Silicone.

I ordered small quantities on Amazon from here:
http://www.amazon.com/dp/B008MKXQ9M/?tag=skimlinks_replacement-20 (10 pcs. for $3.49 - 10mm (ID) X 16mm (OD) X 3mm (Diameter) Silicone)
http://www.amazon.com/dp/B008ASY3Y8/?tag=skimlinks_replacement-20 (10 pcs. for $3.47 - 12mm (ID) X 18mm (OD) X 3mm (Diameter) Silicone)
Larger quantities (and the 11x17x3 in silicone) can be purchased at http://www.oringsandmore.com/.

I welcome others to carry the torch from here and post their results. I’ve also attached a few photos.
No. 5 is on the left, a BUNA -111 (agreed ball lock size) in the middle, and No 3 on the right.

Has anyone tried the 11mm x 17mm x 3mm Buna for the pin lock posts?

 

[barrooze]

Well, just found a leak in my gas line from a slightly cocked gas QD with a poor-fitting o-ring. Is the general consensus for pin lock QDs to use the silicon 10mm x 16mm x 3mm o-ring? Has anyone tried the 11mm x 17mm x 3mm?

Thanks!!

 

[fifelee]

Well, just found a leak in my gas line from a slightly cocked gas QD with a poor-fitting o-ring. Is the general consensus for pin lock QDs to use the silicon 10mm x 16mm x 3mm o-ring? Has anyone tried the 11mm x 17mm x 3mm?

Thanks!!

I see no need to go bigger then 10mm x 16mm x 3mm. It is plenty tight. Silicone is great or save some money and use Buna

 

[Mark_tries_brewing]

I just wanted to add that I have found lid o-rings that seem to seal reliably with or w/o pressure. http://www.mcmaster.com/#90025k551/=tv3mi3

I highly recommend them to anyone especially since I have had problems with some lids leaking when I drop the pressure to fill bottles form a keg. Please add these O-rings to the original post.

 

[KindofBlues71]

I removed and cleaned all the o-rings on my 2.5 gal ball lock keg and subsequently lost one of the universal poppet o-rings. I did some searching and found them for sale at Brooklyn Homebrew. There have been a few requests for the universal poppet o-ring size so here's the info according to Brooklyn Homebrew:

Universal Poppet O-ring
4mm ID x 6mm OD x 2mm Thickness, -35° to 250° F Temp Range

I'm not affiliated w/ Brooklyn Homebrew, just passing the info along. I did not order from them as I needed the o-ring ASAP and wound up buying a replacement poppet valve w/ o-ring from my LHBS.

 

[mr_rogers]

So I pulled the trigger on a silicone oring order from mcmaster carr. I plan to replace all of my orings with silicone because the Buna-n ones seem to stretch and degrade pretty quickly. anyone have any idea what kind of lube is best on the silicone orings? I know i shouldn't use silicone but would my normal Keg lube work on silicone?

 

[brettwasbtd]

I use the normal keg lube without any adverse effects... Maybe I have used then long enough though? I only use them for the posts, not the dip tubes though

 

[mr_rogers]

I'm pretty certain you should see the effect pretty quick. Doesn't it dissolve silicone?

 

[milldoggy]

I use silicon grease on my silicone orings, been two years, no ill effect.

 

[milldoggy]

I just checked what i use, it is petrol-gel, got it on amazon. Does not say silicon, maybe it is not. It is white grease.

 

[milldoggy]

http://www.amazon.com/dp/B00DTI6CQ6/?tag=skimlinks_replacement-20

 

[brettwasbtd]

Ya I use the same stuff as @milldoggy

 

[atoughram]

I like this stuff on my o-rings.

http://www.amazon.com/dp/B00E1BX6PU/?tag=skimlinks_replacement-20

 

[milldoggy]

I like this stuff on my o-rings.

http://www.amazon.com/dp/B00E1BX6PU/?tag=skimlinks_replacement-20

Sounds dirty

 

[Mirilis]

tag

 

[Baja_Brewer]

I just wanted to add that I have found lid o-rings that seem to seal reliably with or w/o pressure. http://www.mcmaster.com/#90025k551/=tv3mi3

I highly recommend them to anyone especially since I have had problems with some lids leaking when I drop the pressure to fill bottles form a keg. Please add these O-rings to the original post.

Bumping this - I have some 3-gallon pin-lock lids that won't seal with the silicone o-rings I have, going to order a pack of these and a pack of something with an oversized diameter like here.

Hopefully one of the two will work - it will be totally worth my money after the frustration of trying to get lids sealed, swapping lids, yanking on them, etc.

 

[VegasBrew1]

I know, old thread. But it took some research for me to find o ring sizes for universal poppets. This link could be the correct answer.

http://www.homebrewing.org/Universal-Poppet_p_2615.html

 

[orangehero]

I know, old thread. But it took some research for me to find o ring sizes for universal poppets. This link could be the correct answer.

http://www.homebrewing.org/Universal-Poppet_p_2615.html

https://www.homebrewtalk.com/showthread.php?p=6559739#post6559739

AS568 Dash Number 008 o-rings are a perfect match for the stock o-rings that came with mine. Perhaps ones from other manufacturers use the Dash Number 006 o-rings, but I suppose they would work fine as obviously they can stretch.

 

[cornflake]

Well, just found a leak in my gas line from a slightly cocked gas QD with a poor-fitting o-ring. Is the general consensus for pin lock QDs to use the silicon 10mm x 16mm x 3mm o-ring? Has anyone tried the 11mm x 17mm x 3mm?

Thanks!!

I realize this is quite old, but I have used the 11mm x 17mm x 3mm silicone o-rings for my pin lock posts for about a year now. They seal very well. That is all I plan on using from now on.

 

[barrooze]

I agree! I picked some up as well and they really do seal pin lock QDs great! I usually need to spray some sanitizer on them to lube them up and get them on, but I haven't had any issues at all since switching to them.

 

[barrooze]

I've got some leaky lids! Is anyone using the X-Profile lid o-ring, P/N 90025K551? I see they're a little thinner than the round one listed on the first post, but the x-profile should make a better seal. I just wanted to hear if anyone's tried these out?

Also, does anyone know what the big, squishy Williams Brewing lid o-rings are? I can't find any 3.5" ID o-ring that has a cross-section dimension of 0.310". Any idea what the material is?

Thanks!

 

[jsguitar]

I've got some leaky lids! Is anyone using the X-Profile lid o-ring, P/N 90025K551? I see they're a little thinner than the round one listed on the first post, but the x-profile should make a better seal. I just wanted to hear if anyone's tried these out?

Also, does anyone know what the big, squishy Williams Brewing lid o-rings are? I can't find any 3.5" ID o-ring that has a cross-section dimension of 0.310". Any idea what the material is?

Thanks!

I'm using the x profile ones and they do work well for me. They are thinner as you say but seem to work better than the red silicone ones. I think they're worth a shot but YMMV.