I examined some of the screws and fasteners this morning that you requested.
1) The cowl vent screws (4 of them) are all identical (1/4" head, with 5/8" captive washer, w/ head marking the same as the prev photo showed - 2 concentric circles with 'delta' symbol inside. Screw threads are 1/2" long. Yes, it appears Dave's fasteners are the same as mine.
2) The screws - also in the cowl vent panel - which retain the squirter hard lines, are also identical. 1/4 hex with a small shoulder, 1/4" long threads.. both are identical on my car and do not have any head marking).
3) I removed one of the retainer screws from the glove compartment box. It is 1/2" long, rounded head phillips , with an apparent dark phosphate coloring. (photos attached).
Gary / 69Z28-RS