Bolts
thingiverse
A personalized rendition of http://www.thingiverse.com/thing:311919 is available via the Customizer at http://www.thingiverse.com/apps/customizer/run?thing_id=311919. To create this customized version, you can adjust settings such as Length (set to 16), Wrench Sizes (0), number of facets ($fn = 30), type (1), thread count (8), spacing (17), direction (down, 1) and pattern (across, 1).
Download Model from thingiverse
With this file you will be able to print Bolts 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 Bolts.