I have done my share of "Hoffman" enclosures and other control cabinets, even hinged JBs in Hazardous Locations. Although Hoffman includes a tooth washer to bond the back panel and enclosure together, I've never seen accessories included to bond the door.
BTW,
I would say that any connection would be a "bonding" jumper and its purpose would be to "ground" the door by establishing a solid connection between the 2 components
