MOUNTING INSTRUCTION FOR SEALING DISCS Assembly Insert the small diameter of the disc into the centre of the coolant nut and apply even pressure until the DIN 69871 disc is properly seated into the nut. The disc must be flush with the outside of the nut. ISO 60 Removal To remove the disc, simply press on the outside of the disc evenly, until it snaps out. MA S 403 BT DIN 2080 HSK-A VDI MORSE 267