Our adapter plates will enable our Standard Posts to accommodate our MBXS Locking Mailboxes.* The plates are made of heavy wall aircraft grade aluminum and come in colors that match your mailbox and post. The hardware is included.
Threaded option is compatible only with COGO style boxes. Not sure what you need choose no for the threaded option.
*The Oswego mailbox is too wide to mount on the adapter plates.
**Mailboxes and Posts sold separately.