How to undo countersunk screws
Another cunning trick is to mig a reasonable size tack on each side of a hex nut, then use a standard socket while it is still warm. You have to relinish the top of the screw when finished , but at least you achieve the job. Just make sure the tack welds don't cover the slot area of the screw.
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Valentine MkV
Covenanter MkIV
Lynx MKI and MKII
Loyd Carrier / English / Candian / LP.
M3 Stuart
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