Customized version of http://www.thingiverse.com/thing:713300

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=713300

Using the following options:

nut_thickness = 2.5
knurled_height = 50
nut_width = 2.46
height = 40
supportless_friendly = 1
nut_sides = 6
backlash = 0.1
knurled_density = 50
screw_hole_length = 100
knurled_strong = 5
screw_hole_diameter = 55
cross_section = 0
diameter_2 = 125
diameter_1 = 150
bottom_thickness = 0.6