Customized version of http://www.thingiverse.com/thing:1648726

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=1648726

Using the following options:

thread_winding_distance = 5.5
thread_spiral_resolution = 8
thread_thread_height = 4.4
cap_diameter = 60
thread_number_of_windings = 2.5
cap_height = 23
resolution = 60
thread_thread_thickness = 1.6
thread_spiral_offset = 2.7