Customized version of http://www.thingiverse.com/thing:193647

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=193647

Using the following options:

thread_length = 25
thread_step = 2
head_diameter = 30
non_thread_length = 135
nut_type = normal
thread_outer_diameter = 20
nut_height = 6
nut_diameter = 12
socket_diameter = 5
type = bolt
nut_resolution = 0.5
nut_thread_outer_diameter = 9
resolution = 0.5
head_height = 12.5
nut_step_shape_degrees = 45
step_shape_degrees = 45
inner_diameter = 8
nut_thread_step = 2
countersink = 2
non_thread_diameter = 0
thickness = 2
outer_diameter = 14
head_type = hex