Hook (with or without protrusion for a zip tie), for your semi-temporary cable routing needs.

• Inside diameter is 15 mm. Scale and mirror(!) to your liking.
• Print on the side. No supports.
• Originally designed for an M4 flathead screw with matching 4.3x12 washer.
• Countersunk washer was added later and works so well, I wish I had come up with it earlier.
• Robust design for ASA because I use them in full sunlight.
• Indestructible (I tried!) when printed in PLA with a bit of overextrusion.