On Wed, 23 Jul 2008, Gordon JC Pearce wrote:
was also where I first saw those 12-lobe spline heads,
where the bolt
head looks like the inside of a socket - that was on an '84
There are numerous similar looking fasteners
Double hex
Triple-square (76 Honda head bolts)
12 spline
A flank drive 12 point socket will work on almost all of them. But, get
the right tool, particularly if you ever expect to do it again.