5/8" BSP beer thread (shank / coupler) (5/8" BSP (7/8"-14 nut))
Where 5/8" BSP (7/8"-14 nut) is used, its real dimensions, and how to connect it to other keg fittings.
Published dimensions
- Designation
- 5/8" BSP (7/8"-14 nut)
- Size / thread
- 5/8" BSP female, carried on a 7/8"-14 coupling nut
- Fitting form
- parallel beer thread
- Seals on
- flat nylon or fibre washer on the face of the thread
- Rating / role
- the US and UK draft shank and Sanke coupler beer thread
Used on: the beer-out on Sanke keg couplers, the back of tap shanks and faucet tailpieces.
Homebrew shops call this 5/8 BSP but the mating nut on a shank is 7/8-14. It seals on a flat washer on the thread face, so a Duotight 8mm or 9.5mm to 5/8 BSP body is the clean way onto a shank or coupler from push-in line.
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: KegLand Duotight 8mm x 5/8 BSP (keg couplers and tap shanks) ยท ISO 228-1 (G / BSP parallel pipe threads)