Typical hardness will range from HRB 69-100 and a minimum tensile strength of 60

7 x 2 1/4 Simpson Trim-Head Wood Decking Screws - Square Drive 305 SS - Bulk Pail (3000)

which means you can place them close to each other without having to worry about compromising structural integrity

3/4-16 x 5 1/2 Hex Cap Screw SS 18-8 (A2)

10 x 2 1/2 Simpson Bugle-Head Wood Decking Screws - 6-Lobe Drive 316 SS - 1 lbs Pack (82)

10 x 3 Simpson Bugle-Head Wood Decking Screws - 6-Lobe Drive 316 SS - Bulk Pail (1500) M20-2.50 Hex Cap Screws DIN 933 18-8 Stainless Steel (A2) Typical hardness will range from10 x 3 Simpson Bugle Head Wood Decking Screws 6 Lobe Drive 316 SS Bulk Pail (1500) . 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. 316 stainless steel is ideal where superior corrosion resistance is