0.230 x 2 3 4 Deck Drive® DCU COMPOSITE Screw (Collated) Type 316 Stainless Steel Red Box (1000) Strong Drive SDW TRUSS DESERT PLY Screws Black E Coat These zinc plated anchors are engineered These zinc plated anchors are engineered to hold up to 5x more than traditional anchors of the same size This 1000 pack of 12 14 x 3 Hex Washer Head TEKS® Self Drilling Screws (T3) is durably constructed for superior performance the 2 3 8" DCU Composite screws should have a minimum penetration of 1" into the wooden roof deck sleeper and should not penetrate through the roof deck sleeper Tri lobe thread design reduces damage to the composite board while driving