So I picked up an 81 Spider at auction for $300. Previous owner (read: total moron) busted the oil pan up and tossed it, along with the bolts, prior to dumping it at the auction. I have a new oil pan, new gasket, even the new washers for the bolts, but NO BOLTS! None of the usual suppliers sell them, and there's no info online about them. So I have no clue what the heck bolts to put in there, and neither do any parts stores, or the local Fiat dealer. I've resorted to trial and error, but that's gotten me nowhere either.

So please, if you have any leads on where I can find some, or have a couple extra laying around I can buy off you, or just have the specifications for them even, let me know.

Also need the 4 bolts for the flywheel cover, and it appears to be the same as oil pan bolts?

8.8 grade 6 mm bolt, pitch is likely 1.25 https://www.metricscrewandtool.com/our-catalog

sweet, thanks!

belmetric carries a large supply of hardware too, had good luck with them.

I keep a very cheap Metric and SAE tap and die set handy to gauge what size bolts I need when I no longer have the original fastener handy. Find the tap from the Metric set that fits, measure the depth of the hole and then just about any half way decent auto parts store should have plenty of them in grade 8.

Note that thread pitch on 6mm is going to either be .75mm or 1.0mm.

These tap and die sets are only $16.49 and regularly go on sale for less than $10 with a coupon.
https://www.harborfreight.com/carbon-st ... 62832.html


The metal thread pitch gauge alone makes it a decent value.

While its not Industrial Quality with a gentle hand and a liberal amount of Tap Magic Thread Cutting Fluid (not the gummy oil that is better for plumbing) it will get you though. Be mindful that even name brand taps are easy to break especially when you get below 8mm so once you get a tap started its only 1/8 to 1/4 of a turn at a time backing off regularly to clean off the cuttings.