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 provide a clean finish because of their special head design and are available with painted heads in 13 colors, matched to blend with most major PVC and composite decking manufacturers. Trim-Head Screw, 6-Lobe Drive — #7 x 1-5/8 in. T-15 Type 316, Gray 01 (70-Qty) (Pack of 600).