Simpson #7 x 2-1/4" Gray, Trim-Head Screw, 6-Lobe Drive 305 Stainless SteelModel No. S07225FT Gray Coating Material. Type 305 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. Gray 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