Bonnet stay and door screw/bolt size query

[mangocrazy]

I'm intending to replace the cross head countersunk screws that Lancia used on the Beta bonnet and door mounts (possibly elsewhere as well) with some allen bolt/socket screw equivalents. As the car is in France and I can't take one off and measure it, would anybody happen to know the size and length?

I seem to remember they were pretty chunky (M10 or M12), but have no idea of thread pitch and length. Does anyone know?

[HFStuart]

Thread is M8 std. Head diameter is 15.7mm. There were at least two thread lengths 15mm with a pointed tip and 10mm with a flat tip.

There may be others but those are the two in my desk :-)

[MattNoVAT]

I can do this but not till next weekend as I'm away on business.

If nobody comes up with the details sooner pls remind me at end of the week.

[MattNoVAT]

These are M8 with a 1.25 thread pitch

I saved all the good ones from the car I dismantled  (i.e. those that did not have the cross head chewed up)

[mangocrazy]

Hi Matt,

Thanks for the confirmation. Could you measure the overall length of one of the bolts, please? I think for countersunk screws the dimension to order is from top of head to end of bolt/screw (i.e. overall length) whereas for socket screws or bolts, it's only the length of the shank of the bolt that is measured.

[MattNoVAT]

Will do - I'll be home from work in a couple of hours.

[MattNoVAT]

Overall length is 22mm.

That's total from top of flathead to tip of the tapered end.

[mangocrazy]

Many thanks Matt. A Google search for 'M8 x 1.25 countersunk stainless 22mm' is underway as we speak...