Böllhoff M4 Mandrel 23511904001 / 4257496

Nuts sold separately, for the full kit please refer to RS stock no ; 425-7480 425-7480. Crimp nuts. Crimp nuts for screw fixing to thin panels wherever rear access is impossible. When fitting, the serrated part of the nut expands inside the hole to provide high torque resistance. The special design of these nuts ensures excellent resistance to rotation and vibration. Both flanged and flush type nuts can be fitted with the same tool.