The file '1.75-6TPI Gas Cap For Lawn Mower 3D Printer Model' is (stl) file type, size is 270.8KB.
The gas cap for my Toro 22" mower (with B&S engine) got crushed. I immediately found one other design (http://www.thingiverse.com/thing:363068) but it was too large. I used Blender with the Bolt Factory plugin to create this. Fits nicely.
gascap.stl | 762.6KB |