Sorry, no photo. Leaving for York soon. They're about 1/2" long, 1/8" diameter with about a 5/16" dia pan head. They're a little fatter on the end so when you pop them in the hole they tend to stay put. IF you put a daub of body seam sealer or rtv on the hole, that should keep moisture out of the hole. Restoration Specialties in Windber, Pa carries them.
Verne