which can be any number you see fit for your job

3 USS Flat Washer Zinc Plated

1/2 x 4 Powers Round Toggle Bolt Zinc Plated (25)

1 1/4-12 x 9 Socket Cap Screw Alloy

10 x 3 Simpson Bugle-Head Wood Decking Screws - 6-Lobe Drive 305 SS - 1 lbs Pack (68) Powers Nail-in Anchors Stainless Steel which can be any number10 x 3 Simpson Bugle Head Wood Decking Screws 6 Lobe Drive 305 SS 1 lbs Pack (68) . 6 lobe drive prevents driver bit cam out and stripping in recess. Type 17 tip provides fast starts and prevents splitting in hardwoods. Coarse threads run approximately 2 3 up the shank to help draw the decking tightly to the substrate. Pre drilling is recommended near board ends to prevent splitting. Drive Sizes: #6 T15 #8 T20 #10 T25