5.5
thingiverse
This customized design is based on the thing at http://www.thingiverse.com/thing:82067, which was created using Customizer! (http://www.thingiverse.com/apps/customizer/run?thing_id=82067). To use it, set Tool_Length to 10, Nut_Size to 5.5 mm, FS at 0.1, and Tool_Height as 2.5. The font used is from write/Letters.dxf file, and it includes a holding cap with a size of 5.5mm.
Download Model from thingiverse
With this file you will be able to print 5.5 with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on 5.5.