Cofix lock nut is a separable lock nut with metric thread made of polyamide 66. It is halogen-free, non-flame-propagating and available in black. This separable lock nut is used specifically for the separable COFIX screw connection. The advantage is that the lock nut can be separated. Protection class IP43 according to DIN EN 60529. Temperature resistance according to LV312-3: -40° C to +120° C, briefly up to +140° C. Flammability: UL 94 HB. DIN EN 61386-23 (VDE 0605-23)