FN indicates the condition of a product that is brand new from the factory. For it to be FN, the product should not be more than two years old since manufacturing.
SV - Serviceable
SV indicated a serviceable part. This means that the part is repaired and passed the functional tests. The exact specifications of the condition might also be stated at times.
OH - Overhauled
OH condition refers to the possible overhauling of the product or equipment. This could involve completely or partially disassembling the product and restoring it to an optimum/maximum level of functionality.
