Customized version of https://www.thingiverse.com/thing:1229682

Created with Customizer! https://www.thingiverse.com/apps/customizer/run?thing_id=1229682

Using the following options:

$fn = 60
plug_height = 3
plug_depth = 12
pipe_thickness = 2
pipe_side = 40
outer_rad = 5
inner_rad = 1.5
plug_walls = 3
lock_rad = 5
lock_protrusion = 0.2
lock_position = 7
chamfer = 0.3