The lube plate you mentioned is a 12 inch lube plate, and B&W recommends a 10 inch lube plate for the Patriot, so I recommend the following:
- Lube Plate for Reese 5th Wheel Trailer Hitches - 10" Diameter # RP83002
The # RP83002 will indeed stay on the king pin without any other accessories or parts. view full answer...