caliper bolt pin threading confirmation

Thanks for your reply and advices
yes it's the thread of the bracket damaged
you're right, it's better and more secure to change for new brackets
i will looking for new ones
i see 3208 as reference
I've made some modification for 4,5" bolt pattern and I've after 70 single piston calipers

one question : what do you mean H22A4 "the OP is located in France"

Best regards
lionel