How do I get a nut to catch the thread

How do I get a nut to catch thread

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 0

crwdns2942205:01crwdne2942205:0:

Hi,

Have you checked that the thread on the bolt is not damaged (stripped) or that the thread in the nut is also not damaged?

crwdns2934271:0crwdnd2934271:0crwdne2934271:0

crwdns2934285:0crwdne2934285:0