D-Type Keg Coupler S.S (includes 2 x Duotight KL06903) and we have been told

and we have been told by our customers that it also works with the Grainfather

This can do it all

More at the bottom of the page

be sure to turn the dial clockwise until it is fully closed

D-Type Keg Coupler S.S (includes 2 x Duotight KL06903) and we have been toldCommonly referred to as the "Twist On Coupler" now with handy dandy duotights! Suitable for attaching Carlton Draught, CUB, Fosters & VB Kegs If you are looking for the seal kit for this part you can purchase this here KL12324 D Type Keg Coupler Full Stainless duotight 5 8" to 8mm push in Commonly referred to as the "Twist On Coupler" Suitable for attaching Carlton Draught, CUB, Fosters & VB Kegs Includes: 1 x D Type Coupler with 5 8" Male Beer and