Simpson T10PTD RP40 10d (3") Preservative Treated Wood Decking Nail, Annular Ring Shank, Pkg 40 HLPC HTPC Beam To Column Ties 5x beams but is also 5x beams but is also available in a wide range of other sizes and both nominal and rough cut lumber Included with this column cap are the necessary Simpson Strong Drive SDS connector screws to provide fast installation and lower profile than standard bolts load rated fastening solution for preservative treated decking applications The Simpson T10PTD RP40 wood decking nails are available in either type 304 or type 316 stainless steel for superior corrosion resistance Annular ring shank increases pull out resistance to provide a secure attachment that reduces cupping