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:

countersink = 2
type = bolt
socket_depth = 3.5
slot_depth = 2
socket_facets = 6
head_diameter = 20
texture = exclude
nut_thread_outer_diameter = 9
drive_diameter = 5
outer_diameter = 14
thickness = 2
nut_height = 6
resolution = 0.5
drive_type = socket
step_shape_degrees = 45
nut_diameter = 12
nut_type = normal
non_thread_diameter = 0
thread_outer_diameter = 12
nut_step_shape_degrees = 45
inner_diameter = 8
thread_step = 3
non_thread_length = 0
facets = 6
nut_thread_step = 2
head_type = socket
slot_width = 1
wing_ratio = 1
thread_length = 25
head_height = 8