300W DC-DC 9A buck conventer cooling fan mount

Mount for popular dc-dc stepdown conventer, it can heat really nicely while running 7-8A constant so i figured out some way of cooling that bad boy, fan is 4010 ( 40x40x10mm) from gdstime and works just enough, fan itself is mounted by using m3 nuts and countersunk screws. Whole unit by 30mm or 35mm (depending on version obviously ) cylindrical head m3 screws, they are long enough to have heat set inserts behind pcb like i do. 

BOM 1 mm

M3x30mm cylindrical head screw - 4 pcs 

M3 nut - 4 pcs

M3x16mm countersunk screw - 4 pcs 

BOM 5 mm

M3x35mm cylindrical head screw - 4 pcs 

M3 nut - 4 pcs

M3x16mm countersunk screw - 4 pcs 

Happy printing :)