Installation Instructions


Z4 Tie-Down Systems utilize CNX-Series Cinch Nuts to compensate for wood shrinkage and building settlement that cause connections to loosen over time. The Cinch Nut uses a self-ratcheting action that permits the cinch nut to move (the rod doesn’t move) or “travel” perpetually in one direction only down the rod. Available for installation with threaded rods that are 3/8 inch through 1-1/2 inch diameter in 1/8 inch increments, the CNX Cinch Nut has been code evaluated and published in ESR-2190.

  • Place the specified Bearing Plate Washer onto the bottom plate of a wood framed wall.
  • With the “wings” oriented downward, place Cinch Nut over the Z-Rod extending from below and push down until it seats firmly on the Bearing Plate Washer.
  • Install 1/4 inch diameter USP WS-Series screws through the wings, penetrating 1 -1/2 inches (minimum) into the wood bottom plate. /li>
  • Model numbers BPW5 and BPW6 fit in-between the screws fastening the wings.
  • Model numbers BPW7 (3-1/4 x 4-3/8) and larger are provided with two screw holes. Align the wing and the Bearing Plate Washer screw holes to allow installation of 1/4 inch diameter WS-Series screws.


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