Böllhoff Plain Stainless Steel Threaded Insert, 12 mm diameter 11 mm 17.5 mm

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.