I recreated the design of well known [BRAND NAME] plastic anchors, making one side of the thread flat for easier printing. I used 100% infill to maximize strength, but you might achieve sufficient durability with a lower infill setting. In my tests, the anchor held firm under my body weight (around 80kg), though I haven't tested it with heavier loads or extended periods of tension.
The author marked this model as their own original creation.