Does the ISAF NATO Medal have any authorized devices for multiple deployments to Afghanistan?

SSG Cody, reference AR 600-8-22 para 9-11e which states "Subsequent awards. Subsequent awards (if approved by the Secretary of Defense) for service in a different NATO operation, U.S. military personnel will affix a bronze service star to the NATO Medal suspension ribbon and service ribbon."

Additionally please reference AR 670-1 para 29-6g for further guidance on the wear of foreign military decorations.

An LT asked me to help him with his ribbon rack prior to taking a DA Photo. Originally, with less years in service than I, he had managed to have TWO National Defense Service Medals and 2 NATO Medals reflected on his ribbon rack as well as his ERB.

I discussed with him the criteria for the NDSM (recommending to go to S1 to get that fixed) and pointed out where to find the guidance on the NATO ribbons.

As 1SG Rink said, only 1 NATO ribbon (typically the first one but must be a Non-Article 5) can be on the rack, other subsequent NATO missions an SM takes part in gets a bronze star on the first ribbon.