Boat Oarlock Mooring Cleat

This is a remix of the Scotty Kayak Cleat.
It was made to fit in the oarlock holder on an aluminum fishing boat.
The oarlock diameter is just over 16mm, the printed post is 16mm for a close running fit.
The oarlock holder is 45 mm deep, the assembled cleat will fit so that the bottom hole will be exposed for a spring clip to retain the cleat in the oarlock holder.
The hole for the spring clip is 4 mm dia.
The pin for keeping the post in the cleat is approx 3mm, you need to drill the metal rod anyhow, so drill to suit whatever retaining pin you use at the top. I repurposed a 3mm stainless finishing nail and peened the cut end.

Parts:
3D print Boat Cleat and Boat Cleat Post
Cut 9mm Dia metal rod x 72mm long, chamfer both ends.
Drill the rod hole in the post and cleat 9mm so the rod fits tight (I had a too tight situation, but have many drill bits so resizing the holes after printing is needed and easy).
Press the rod all the way to the bottom of the post, superglue the assembled post and rod into the top of the cleat.
Cross drill the cleat and install 3mm retaining pin.
Drill the 4mm hole across the post at the bottom. This is for a spring clip to keep it in the oarlock hole.
Note in the pictures the cleat and rod are upside down, top and bottom refer to the installed in boat orientation.

3D printer settings:
You want strength and toughness:
I used CF-PETG for the cleat and CF-PC for the post. 9mm 6061-T6 rod.
0.6 mm nozzle, 0.8mm width, 0.3mm layer, 6 walls, 3 top and bottom layers, 50% tri-hexagon infill.