Cornelius pin-lock keg post (19/32"-18 UNF (both posts))
Where 19/32"-18 UNF (both posts) is used, its real dimensions, and how to connect it to other keg fittings.
Published dimensions
- Designation
- 19/32"-18 UNF (both posts)
- Size / thread
- 19/32"-18 UNF (about 15.1 mm major), gas and liquid the same
- Fitting form
- UNF male post thread
- Seals on
- poppet inside the post; post base O-ring seals to the keg lid
- Rating / role
- Cornelius pin-lock corny kegs; the disconnect locates on pins, not the thread
Used on: Cornelius-made pin-lock corny kegs (gas post has two pins, liquid post has three).
Cornelius pin-lock kegs use 19/32-18 on both the gas and liquid post, the same thread as a Cornelius ball-lock. The gas and liquid posts are told apart by pin count, two versus three, not by thread. Firestone pin-lock kegs differ, so match the post to the keg maker.
Flare fittings seal on the 45 degree flare face and must never be taped. Push-in fittings seal on an O-ring against the tube wall and need the tube cut square. Barbs seal under a worm clamp. Getting the sealing method right matters more than the thread label, because most homebrew leaks are a taped flare or an unclamped barb.
Connect this fitting
Sources: Homebrew Finds keg post thread size reference (per-maker gas/liquid threads) ยท Beer Maverick: swapping pin lock corny kegs to ball locks (post threads)