The available thread length protruding over the thickest tool must be more than 6-mm long. The SDS clic Quick-Locking Nut M14 is a quick-release nut for easy and fast fastening and loosening of a wide range of angle grinder accessories, such as grinding heads, diamond cutting discs and grinding discs. It is appropriate for use with all angle grinders that have a M14 thread and are manufactured in or after 08/90. The disc must be centred at the supporting flange and not at the nut.