I am changing some bushing for a/c compressor. I noticed that the adjuster bolts are gone. What size (thread) are these?
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'86 244 and '87 245

I believe they're M6 but they're so long that you'll never find them in a hardware store- the only likely place is the dealer ($12 each or something) or grab a few in a junkyard. I've found that the PS bracket seems to pull out of it's front bushing with the adjuster pretty easily.
You should be able to get a good belt tension without it, if you use the old crowbar method. Just until you get the new bolts.
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Rob Bareiss, New London CT ::: 'Roterande Fläkt Och Drivremmar!'

McMaster-Carr has M6 cap screws up to 100mm, if that's long enough. But you have to buy more than you need (pkg. of 25 carbon steel for $8.72/pkg of 5 stainless for $4.09, plus shipping of course).
When I've ordered from them and charged it to my Visa card I have gotten delivery the next day.