GN 506-8-M8 GN 351-15-20-M4-EE-55 GN 351-30-15-M8-ES-55 421347 CQ/T-M19x1-36-35 GN614-6-NI DIN 808-50-K30-188-DG GN 50.4-HF-50 GN 605-M4-6-B I.780 32249 DIN 950-GG-250-B22-D GN 116-VK-A1 old reference/new reference GN 116.1-VK7-A1 GN 605-M4-6-BN GN 752-10-M10-NI GN 752-12-M12-NI GN 752-16-M16-NI