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
nut_type = normal
nut_thread_step = 1.25
nut_step_shape_degrees = 45
outer_diameter = 14
head_height = 5
non_thread_diameter = 0
inner_diameter = 8
slot_depth = 2
drive_diameter = 5
step_shape_degrees = 45
wing_ratio = 1
countersink = 2
nut_resolution = 0.5
nut_height = 5
texture = exclude
nut_diameter = 12
thickness = 2
non_thread_length = 0
head_diameter = 12
head_type = hex
slot_width = 1
nut_thread_outer_diameter = 8
thread_length = 25
facets = 6
resolution = 0.5
type = bolt
thread_outer_diameter = 8
drive_type = socket