A locking plug mechanism includes a handle assembly that includes a handle body that is pivotally connected to a handle attachment member. A center pin member is connected to the handle attachment member. The center pin member is slidably received within an opening of a proximal spacer member comprising a proximal spacer located proximally on the center pin member. A distal spacer is located on the center pin member. A seal member is located on the center pin member between the proximal spacer and the distal spacer. The actuation of the handle assembly moves the center pin member relative to the proximal spacer and expands the seal member from a collapsed configuration to an expanded configuration.