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 = 6
nut_type = normal
nut_step_shape_degrees = 45
resolution = 0.5
thread_length = 25
wing_ratio = 1
head_type = hex
slot_depth = 2
thread_step = 2
head_diameter = 12
nut_thread_step = 2
texture = exclude
inner_diameter = 6.9
thread_outer_diameter = 8
drive_diameter = 5
head_height = 5
nut_diameter = 12
facets = 6
non_thread_length = 0
type = washer
nut_thread_outer_diameter = 9
countersink = 2
outer_diameter = 25
step_shape_degrees = 45
socket_facets = 6
thickness = 0.3
slot_width = 1
non_thread_diameter = 0
socket_depth = 3.5
drive_type = socket