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Old 25th Feb 2021, 7:16 pm   #1
OldTechFan96
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Join Date: Jul 2017
Location: Newcastle Upon Tyne, Tyne & Wear, UK.
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Default What Allen Key Size?

I'm trying to remove a grub screw on a piece of test gear and I don't know what size it is or whether it is Imperial or metric.

2mm is too big and 1.5mm is a bit too small. The piece of gear is from the '70s.

Does anybody know the correct size?

Thanks
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