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:

cross_section = 0
supportless_friendly = 1
nut_sides = 6
knurled_strong = 5
screw_hole_length = 100
knurled_density = 50
backlash = 0.1
bottom_thickness = 0.6
diameter_2 = 125
diameter_1 = 150
nut_thickness = 2.5
height = 5
screw_hole_diameter = 55
knurled_height = 70
nut_width = 5.42