[corkybstewart]

I've looked at McMaster's site a dozen times and can't figure out which o-rings go on my kegs.  Does anybody have the part numbers?
Thanks

[maxieboy]

Googled. From a 2 yr old thread on another beer forum.

Here are the McMaster Carr part numbers for the o-rings that fit the ball-lock kegs:

Dip Tube O-Rings
5/16" ID x 1/2"OD x 3/32" width
9452K172 BunaN #109
Pkg 100/$1.89 (yes, these are the same ones the shops sell for fifty cents EACH.)

Post O-Rings
7/16" ID x 5/8" OD x 3/32" width
9452K23 BunaN #111
Pkg 100/$2.15

Lid O-Rings
3 1/2" ID x 4" OD x 1/4" width
9452K218 BunaN #417
Pkg 10/$12.50

[dcbc]

Since someone will probably ask, those work for pin locks, too.

[johnf]

On Jamil Z's recommendation on the BN I bought some post and lid o-rings in silicone and dip tube o-rings in buna-n but the quad seal profile. Same sizes as above. In all cases they are markedly superior to round profile buna-n o-rings and well worth the very small increased cost. Silicone is less durable than buna-n but I have seen no wear in over a year. If I have to replace these every 3 years instead of every 5 or something, I still think it is a no-brainer.

[bonjour]

On Jamil Z's recommendation on the BN I bought some post and lid o-rings in silicone and dip tube o-rings in buna-n but the quad seal profile. Same sizes as above. In all cases they are markedly superior to round profile buna-n o-rings and well worth the very small increased cost. Silicone is less durable than buna-n but I have seen no wear in over a year. If I have to replace these every 3 years instead of every 5 or something, I still think it is a no-brainer.

do you have those part numbers?

[tom]

On Jamil Z's recommendation on the BN I bought some post and lid o-rings in silicone and dip tube o-rings in buna-n but the quad seal profile. Same sizes as above. In all cases they are markedly superior to round profile buna-n o-rings and well worth the very small increased cost. Silicone is less durable than buna-n but I have seen no wear in over a year. If I have to replace these every 3 years instead of every 5 or something, I still think it is a no-brainer.

I have only had bad experiences with the quad rings. The diptube edges cut the corners off. The round O-rings work much better for the diptubes for me. YMMV

[johnf]

On Jamil Z's recommendation on the BN I bought some post and lid o-rings in silicone and dip tube o-rings in buna-n but the quad seal profile. Same sizes as above. In all cases they are markedly superior to round profile buna-n o-rings and well worth the very small increased cost. Silicone is less durable than buna-n but I have seen no wear in over a year. If I have to replace these every 3 years instead of every 5 or something, I still think it is a no-brainer.

do you have those part numbers?

They are easy to find using the dash numbers above but with the varying materials and cross section type. Here are the McMaster-Carr part numbers:

Buna-N Quad Seal for diptube: 90025K368
Silicone round for post: 9396K24
Silicone round for lid:  9396K926

The quad seal ones for the diptube are amazing in terms of how it feels as you screw the post down into them and how well they seal with very little torque applied to the wrench.

With the silicone lid o-rings, I have noticed fewer problems with leaks.

[Hydro]

What might be the McMaster part number for the Coke Pin style cornie keg o-rings?

1.  Liquid and Gas Dip Tube O-rings
2.  Post O-rings for Liquid and Gas Posts
3.  Lid O-ring

Thanks in advance

[tygo]

Since someone will probably ask, those work for pin locks, too.