I haven't done it yet but have some black stainless self tappers from Accu to go on but haven't had a chance and they're currently down the back of my garage workbench.
I tried to get to match the original BMW but in a longer length but couldn't get anywhere as they seem BMW specific (TS5x20 sw8 d=22; self tapping; 5mm thread; 20mm length; 8mm hex head; 22mm flange)
The supplied ones seem to be a No10 self tapping and I had a No10 hold fine so I just got some in 38mm and 50mm black stainless, will update when I get round to it.
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G42 M240ix
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