I bent the screws the hold the top truck piece into the deck of my board. I am rocking the MBS Matrix II trucks. I know they are M5 screws and I believe they are 2 inches (correct me if I am wrong). I also have the riser kit (comes with low grade easily breakable screws).
Where can I buy the correct screws in a heavier duty material? Ideally Allen head but Phillips will be 2nd best.
Black oxide or zinc are just coatings, they don’t impact the strength. 12.9 is the steel type/grade of the bolt, good for high tensile purposes. I believe stainless has its own grades
That bolt in the photo was a left over i only have 2 or 3 but keep em as a relic . Boltdepot.com will likely have what yah need. If you cant find the right head grab 100 of number 10 washers or diy an antisink!
This thread has some good info it looks like zinc plated 12.9 is your best bet.
McMaster has tree-dialogues that are essentially the best explanation of fasteners in general. Taking a peek should explain most of the specs/jargon to you. You can find what you need via their catalog & then use the info to buy elsewhere if needed.