Cover screw as additional screw, from TK PS/PC 77
grey cover screw for all grey covers in product groups TK 77-8 / 97-8 / 99-8 / 1111-9 / -1309-8 / 1313-10 / 1809-8 / 1811-8f / 1811-11 / 1811-13f / 1811-16 / 1813-8f / 1813-11 / 1813-13f / 1813-16/ 1818-8f / 1818-11 / 1818-13f / 1818-16 / 2518-8f / 2518-11 / 2518-13f / 2518-16 / 3625-11 / 3625-16