Tensile strength (not pull out) will meet a minimum of 60

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8 x 1 1/4 Simpson Pan-Head Marine Screw - Phillips Drive 316 SS - Box (100) 6-Lobe Bugle-Head Decking Screws 305 Stainless Steel Tensile strength (not pull out)8 x 1 1 4 Simpson Pan Head Marine Screw Phillips Drive 316 SS Box (100) . Marine screws bite and hold fast in fiberglass, plywood and wood substitute materials Use for projects exposed to harsh marine or many chemically caustic conditions Ideal for applying trim, rub rail and molding to fiberglass boat hulls Extra sharp points speed screw starts during assembly Specially engineered, high low thread form incorporates indentations ("teeth") that cut