Böllhoff 209 Piece Plain Steel Insert Kit 23511900501, M3, M4, M5, M6

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.