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:

nut_height = 7
thickness = 2
wing_ratio = 1
texture = exclude
drive_type = socket
nut_diameter = 16
head_type = hex
nut_step_shape_degrees = 45
facets = 6
slot_width = 1
head_diameter = 12
non_thread_length = 0
thread_step = 2
thread_length = 25
nut_thread_outer_diameter = 12
type = nut
inner_diameter = 8
slot_depth = 2
nut_resolution = 0.5
nut_thread_step = 2
resolution = 0.5
non_thread_diameter = 0
nut_type = normal
drive_diameter = 5
outer_diameter = 14
countersink = 2
step_shape_degrees = 45
thread_outer_diameter = 8
head_height = 5