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:

thickness = .75
slot_width = 1
resolution = 0.5
inner_diameter = 4.5
thread_step = .7
step_shape_degrees = 45
thread_outer_diameter = 4
outer_diameter = 8
non_thread_diameter = 0
drive_type = socket
facets = 6
drive_diameter = 5
type = nut
head_height = 4
head_type = hex
nut_step_shape_degrees = 45
slot_depth = 2
countersink = 2
texture = exclude
wing_ratio = 1
nut_thread_step = .7
nut_thread_outer_diameter = 4.4
nut_diameter = 8
nut_type = normal
thread_length = 25
socket_depth = 3.5
head_diameter = 8
nut_height = 4
non_thread_length = 0
socket_facets = 6