O-ring

From Home Brewing Wiki

O-Rings are used to seal the different fittings on a cornelius kegs to prevent carbon dioxide from escaping.

O-ring sizes for common Homebrewing applications

[edit] Silicone O-rings

Cornie lid o-ring size 417 Common supplier: McMaster-Carr part #9396K926

Cornie post o-ring size 111 Common supplier: McMaster-Carr part #9396K24

Cornie dip tube o-ring size 109 Common supplier: McMaster-Carr part #9396K74

Weldless o-ring for 1/2" bulkheads size 211 Common supplier: McMaster-Carr part #9396K32

Proflowdynamics camlock replacement o-ring size 211 or 210 (see here or here for example) Common supplier: oringsandmore.com, size 210 or 211

[edit] Buna-n O-rings

Cornie lid o-ring size 417 Common supplier: McMaster-Carr part #9452K218

Cornie post o-ring size 111 Common supplier: McMaster-Carr part #9452K23

Cornie dip tube o-ring size 109 Common supplier: McMaster-Carr part #9452K172 (round cross-section) or #4061T155 (square cross-section)