Hoooowwwwdy!

70dart said
Welcome aboard. Outside screw is phillips and there is a nut that goes on the stud or bolt on the inside. I don't remember the head on that though but I will try to find mine to let you know. Enjoy the site!

Yup, thats right and a 1/4 inch nut, with a 7/16 socket, holds it on from inside the door.

And welcome to the site, Twisted!