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:

head_type = hex
drive_type = socket
nut_type = normal
slot_depth = 2
head_height = 5
thread_length = 25
outer_diameter = 25
inner_diameter = 2.5
non_thread_length = 0
head_diameter = 12
countersink = 2
texture = exclude
facets = 6
drive_diameter = 5
wing_ratio = 1
socket_facets = 6
nut_thread_step = 2
nut_diameter = 12
thickness = 10
socket_depth = 3.5
nut_step_shape_degrees = 45
thread_step = 2
non_thread_diameter = 0
thread_outer_diameter = 8
nut_height = 6
step_shape_degrees = 45
type = washer
resolution = 0.5
nut_thread_outer_diameter = 9
slot_width = 1