| Union nut MCK-PK-3 205254 | CK connection 3mm | 8 | 8 | | €1.14/piece |
| Union nut MCK-PK-4-KU 211291 | CK connection 4mm | 12 | 12 | | €0.90/piece |
| Union nut MCK-PK-4-R 205257 | CK connection 4mm | | | | €1.23/piece |
| Union nut MCK-PK-4 2965 | CK connection 4mm | 12 | 12 | | €1.25/piece |
| Union nut MCK-PK-9-KU 211293 | CK connection 9mm | 19 | 19 | | €1.14/piece |
| Union nut MCK-PK-3-KU 211289 | CK connection 3mm | 8 | 8 | | €0.90/piece |
| Union nut MCK-PK-6 2966 | CK connection 6mm | 14 | 14 | | €1.25/piece |
| Union nut MCK-PK-13 206504 | CK connection 13mm | 24 | 24 | | €4.03/piece |
| Union nut MCK-PK-6-KU 211292 | CK connection 6mm | 14 | 14 | | €0.90/piece |
| Union nut MCK-PK-9 2967 | CK connection 9mm | 19 | 19 | | €2.11/piece |