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1968 Mustang / Re: 1968 San Jose GT 390 Fastback Drivers Side Mirror mounts
« Last post by dkknab on Today at 12:08:04 PM »From the factory the outside mirror used the posi drive type machine thread screw. They have a counter sunk head like the generic mirror screws . Posi drive looks like a Philips cross head impression however they have a slighter different shape inside the allows for more torque to be applied without slipping. They are identified by 3 slash marks in between the Phillips impression . I believe that they are mentioned in the MCA rules. The picture I posted is to show the marks on the head. Disregard the flat head and sheet metal threads. NPD used to sell them but can't say currently.
That's interesting. They seem to be hard to come by. When I search for 376770-s100 screw that is listed in the fastener spreadsheet and on the assembly manual page N8-8505 I come up empty.