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:

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