The eighteen Ms1200s 2013 My13 (multistrada 1200 S Touring) D160-00013 18b - Wiring Harness component parts are all listed in this schematic.
A sample from the products for the 18b - Wiring Harness include: Clamp, Rubber 82mm, Clamp, Rubber 62mm, Spring Washer, Screw Tef M6x14.
The component with the lowest price in the 18B - WIRING HARNESS schematic is the Spring Washer.