Technique for threaded pin clamping
1. Insert the threaded pin through the clamp.
2. Insert the rectangular washer (8 mm hole) below the threaded pin.
3. Insert the clamp with the washer though the slot in the ring.
4. Insert the round washer and the nut on the clamp on the opposite side of the ring.
5. Stabilize the clamp with a wrench, and tighten the nut on the opposite side.