25/32 x 6 Reduced Shank Drill Bit Cobalt (1/2 Shank)

Marine screws are locked in place thanks to their "teeth" (the thread indentations will resist back-out even after prolonged vibration)

1/2-13 x 4 1/4 Simpson Wedge Anchor 304 SS (25)

7/8-9 x 2 1/2 Socket Set Screw Cup Point Alloy

3/8-24 L9 Hex Nut Alloy Cadmium Yellow and Wax Coated Domestic USA (3000) M24-3.00 Socket Set Screws Cup Point DIN 916 Black Oxide 25/32 x 6 Reduced Shank3 8 24 L9 Hex Nut Alloy Cadmium Yellow and Wax Coated Domestic USA (3000) . L9 High Tensile Strength Hex Nuts are designed for use in high stress, severe service environments. The highest mechanical strength off the shelf fastening system available, its special features control torque tension characteristics to develop high clamp loads when using properly controlled tightening methods. Brighton Best manufactures L9 nuts from AISI alloy steels. L9