The stowage hatch cleats are now ready as seen in the picture below.
The bottom right one is the first full scale mock-up. It has two different horns for testing. A piece of cupper pipe is used as a rivet. The final product have two rivets. Rivets are used becouse the can be ground down flat and smoth on each side of the hatch and of course no amount of vibration will unscrew them.
To be continued…