What screws does this device use?

Was disassembling to clean the case and one of the 3 screws at the bottom dethreaded. Does anyone who's done the same know?

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

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 1
crwdns2934285:0crwdne2934285:0