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_step = 2.309
outer_diameter = 14
thread_outer_diameter = 15.875
drive_diameter = 5
nut_type = normal
slot_width = 1
head_type = hex
resolution = 0.5
countersink = 2
nut_diameter = 12
non_thread_diameter = 0
wing_ratio = 1
slot_depth = 2
step_shape_degrees = 55
nut_thread_step = 2
facets = 6
socket_facets = 6
inner_diameter = 8
socket_depth = 3.5
texture = exclude
type = bolt
nut_thread_outer_diameter = 9
drive_type = socket
thickness = 2
head_height = 5
non_thread_length = 0
thread_length = 25
nut_step_shape_degrees = 45
nut_height = 6
head_diameter = 20