N606677-S36

These are N606677-S36, which are an M6-1.0mm x 28mm screw with a captive washer.  They have a zinc and dichromate coating, which gives them a yellowish appearance when new.   They are used for many things including fastening the fenders to the radiator support, the corner brackets to the radiator support and to the fenders, etc. They are Auveco #12335 and Fastenal #0162795, and Clips and Fasteners has them as item #A15778. (DSCN7442)