3/8 x 3 1/2 Round Split Drive Anchor Zinc Plated (25)

1/2-13 x 4 3/4 Hex Cap Screw SS 316 (A4)

the hardness rating is HRC 24-35

you may need toggle bolts for a specific purpose or just to have on hand as needed

5/8-11 x 4 1/2 Hex Cap Screw SS 316 (A4)

8 x 1 1/2 Simpson Flat-Head Marine Screw - Phillips Drive 316 SS - Box (100) Cap Nuts 18-8 Stainless Steel 3/8 x 3 1/2 Round8 x 1 1 2 Simpson Flat 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