acceptable for ACQ pressure treated lumber

Hex nut with a nylon-filled collar at its back end

3/4-10 x 7 Flat Socket Cap Screw Alloy

(A6™) 1/4 ALLIGATOR® Flush Mount Anchor Nylon (100)

the expansion mechanism compresses and exerts force against the walls of the hole

8 x 3/4 Square Flat Particle Board Screw w/ Nibs T17 Zinc Plated - Carton (10,000) 5/8 Hex Lag Screws Hot Dipped Galvanized acceptable for ACQ pressure treated8 x 3 4 Square Flat Particle Board Screw w Nibs T17 Zinc Plated Carton (10,000). Wood screws used for interior wood applications. Asymmetrical thread pattern resists material slippage during pull out and vibration. Counter sinking NIBS for a flush finish. Type 17 tip reduces wood splitting. Superior holding power.