Customized version of http://www.thingiverse.com/thing:70494

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=70494

Using the following options:

nut_th = 6
wing_thin_d = 7
total_d = 60
nut_d = 17
wing_h = 4
wing_thick_d = 7
wing_count = 3
nut_shoulder_x = 2.8
nut_shoulder_z = 2
roundness_ratio = 30
hex_nut = 1
thread_d = 10