The sheath ends hexagonal screws are crimped onto the sheath ends. They are adjustable fasteners for adjusting the tension of the cable.
The end caps are fasteners that form the link between your frame and the duct. The end caps provide better stability for the mechanical drive.
Turned stops provide a more precise adjustment. To be completed with a hexagonal screw to have a possible adjustment.
Zinc-plated steel fastener with threaded holes in each for adjusting the cable tension in the middle of a mechanical control.