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:

wing_ratio = 1
nut_thread_step = 2
resolution = 0.5
head_height = 5
slot_depth = 2
slot_width = 1
nut_type = normal
drive_type = socket
type = rod
head_type = hex
nut_diameter = 12
thread_length = 25
head_diameter = 12
thread_outer_diameter = 16.5
texture = exclude
nut_height = 6
drive_diameter = 5
non_thread_diameter = 0
non_thread_length = 0
thickness = 2
nut_step_shape_degrees = 45
facets = 6
outer_diameter = 14
thread_step = 2
countersink = 2
step_shape_degrees = 45
socket_facets = 6
socket_depth = 3.5
inner_diameter = 8
nut_thread_outer_diameter = 9