This is the current production mast receiver. You should be able to reuse the screws/washers, but a new gasket is probably needed. Be sure to check the HC 79513001 Back Up Ring for damage if you're replacing a broken receiver.
If the bottom of your Adventure mast has a stainless pin sticking out, you need the other mast receiver (HC 79514001).
Backup Ring and Gasket shown in image not included. Order separately.