Re-oriented 22steve22's sailing clam cleat so that the printing layers help draw the rope into the teeth. Rope lock in is more secure and reliable with the ropes I tested.
Grabs a 3mm OD rope solid as a snapping turtle when printed at 60% scale. I expect it will grab paracord just as well.
MonoPrice Maker Select V2
Settings shouldn't matter as long as you have good layer bonding, bridging, and overhangs. I printed with 3-perimeters, 5-6 top and bottom layers in PETG at 265C with fan.