No, there at least fan manufacturer and model and you can google other things by it. Sometimes it also contains bearing type and max current:
So by googling powerlogic pla13525b12m I found all specs for my 135mm psu fan and bought replacement with hydrodynamic bearing:
http://www.powerlogic.tw/images/pdf/power_axial_fan_2012_06_05_75843.pdf So you can try to find same model on market or similar: size, mounting holes placement, rpm, current and performance (pressure and airflow)