Because I stripped the same part yesterday, and broke the long bolt in three!
View attachment 303420
The adjuster nut/ eyelet is M10 x 1.25 (Fine thread) , the long bolt is M8 x 1.25 (Course thread)
The strut top nuts are M10 x 1.0 so won't work unfortunately
Hope that helps!
I don't know why your strut top nuts don't fit the eyelet bolt?
Maybe your New Zealand cars are different?, Or maybe my aftermarket struts are different?
I didn't try a nut from my DD, because I don't want to mess with the car unless I have to.
I found this info as well...
Metric Threads Explained
The size of a metric fastener (screw, bolt, etc.) is generally specified as diameter, pitch and length, all in millimeters (mm). Metric fasteners are usually classified as either coarse or fine, referring to their thread pitch, although some sizes are available in an extra fine thread. Coarse is the most common metric thread and is assumed when pitch isn't specified.
Consider this size…
M8-1.0 x 20
Here's what the description means…
M = Metric thread designation
8 = Nominal diameter, in millimeters
1.0 = Pitch (distance from thread to thread), in millimeters
20 = Length, in millimeters
Remember these tips about metric fasteners…
Diameter: the larger the number, the larger the screw or bolt
Pitch: the larger the number, the more coarse the thread (the fewer the threads per unit of measure); coarse is the most common metric thread and is assumed when pitch isn't specified
Length: the larger the number, the longer the screw or bolt
Standard: the DIN or ISO standard number describes the fastener