Sanke D coupler (American Sankey) (type D, G5/8 ports)
Where type D, G5/8 ports is used, its real dimensions, and how to connect it to other keg fittings.
Published dimensions
- Designation
- type D, G5/8 ports
- Size / thread
- 5/8" BSP (7/8"-14) beer and gas ports; 5/16" gas barb, 1/4" beer barb
- Fitting form
- single-probe keg coupler
- Seals on
- flat washer on each threaded port; barbs seal under a worm clamp
- Rating / role
- the North American commercial keg standard
Used on: Budweiser, Miller, Coors, Yuengling and the majority of US craft kegs.
The D coupler carries the same 5/8 BSP (7/8-14) beer thread as a homebrew shank, so a Duotight or John Guest to 5/8 BSP fitting takes push-in line straight onto it. The gas-in port takes a 5/16 barb. It taps the widest range of US kegs, which is why D is the default home draft coupler.
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: Iron Mountain Refrigeration keg coupler guide (D, S, A, G, M, U Sankey systems) · Sanke D coupler spec (G5/8 beer and gas ports, 5/16in gas barb, 1/4in beer barb) · HomebrewTalk: Sanke D coupler thread sizes (7/8-14 / 5/8 BSP ports)