Socket Head Cap Screw, 3/4-10 x 2 1/2", Stainless Steel 18-8, Hex Socket (Quantity: 10) Coarse Thread, 3/4 inch Hexagonal Allen Bolt, Length: 2 1/2 inch, Full Thread

1You may also like Red Head LDT-3840 Large Diameter Tapcon 3/8-Inch by 4-Inch Anchor (50 per Box)$$Hardware.