Hello, can someone please tell me what the thread/size of the bolts that hold the A/C box to the firewall? I have none to compare to and it doesn't match any other bolts I have. 1978 Malibu.
They are a fairly coarse thread, I'm just not sure what exactly. I keep seeing M6 being thrown about, but no confirmation on the thread.If it's the ones I'm thinking they are very close to a sheet metal screw type thread.
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