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
outer_diameter = 14
thread_outer_diameter = 8
nut_type = normal
drive_diameter = 5
head_type = hex
slot_width = 1
countersink = 2
resolution = 0.5
nut_diameter = 7
slot_depth = 2
nut_thread_step = 0.7
wing_ratio = 1
step_shape_degrees = 45
non_thread_diameter = 0
facets = 6
socket_depth = 3.5
socket_facets = 6
inner_diameter = 8
nut_thread_outer_diameter = 4.3
drive_type = socket
type = nut
texture = exclude
head_height = 5
non_thread_length = 0
thickness = 2
thread_length = 25
nut_step_shape_degrees = 30
nut_height = 3.8
head_diameter = 12