What size is the Hex tamper resistant screw for the Bose SoundLink II?

What is the size for the hex tamper resistant screw for the Bose Around-Ear Soundlink II headphones? It is surely smaller that a 1.5. Has anyone else determined the correct size? Thank you so much.

Block Image

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

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 0
crwdns2934285:0crwdne2934285:0