Simpson #7 x 2-1/4" Trim-Head Screw, 6-Lobe Drive 316 Stainless Steel 3000PkModel No. T07225FTB Coating Material. Type 316 Stainless Steel Screw Size. #7 Length (in.) 2 1 4 Head Diameter (in.) 0. 23 Drive Type. T15 6 Lobe Head Type. Trim Head Thread Type. Coarse Threads Point Type. Type 17 Point Color. None Approx. Count per Lb. 138 Trim Head decking screws are available in stainless steel for superior corrosion resistance in marine or high exposure environments where PVC or composite decks are installed. Trim Head screws