Flat head, conical underneath, locks in countersunk square holes. The length is calculated from the tip to the top of the head.
Used together with flange lock nut M16 and Trilock nut M16 to attach mounting plates, snow plow running shoes and certain snow plow steel edges of American design. Can also be used for mounting bolt-on edges.
Class 12.9. Recommended tigheting 270Nm +/-40Nm. When mounting with flange lock nut, the torque can be increased slightly due to the larger friction surface of the larger nut diameter.