Yes. It can screw on in place of the platen, and will
support the tank bag at least as well as the BMA plastic
platen. However, there are a few drawbacks. First, it
is metal, and with the tankbag removed, it can be forced into
contact with your tank, just like the plastic one. Being
metal, it would scratch the paint if that happened. Second
drawback is that your gadgets would stay on the bike when you
remove the tankbag, so there is a reduction in convenient
security.