Coarse threads approximately 2/3 up the shank draw the decking tightly to the substrate

9/16-18 x 6 Grade 8 Hex Cap Screw Yellow Zinc Plated

6 x 2 Phillips Bugle Hi-Low Drywall Screws Phosphate Coated - Carton (3500)

1/4 x 1 1/4 Mushroom Spike Zinc Plated (100)

15/64 Heavy Duty Drill Bit - Stubby Length

9 x 2 1/2 Phillips Flat Particle Board Screw w/ Nibs T17 Zinc Plated - Carton (2,500) Premium SDS Plus Hammer Drill Bits Coarse threads approximately 2/3 up9 x 2 1 2 Phillips Flat Particle Board Screw w Nibs T17 Zinc Plated Carton (2,500) . 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.