These 1/4-14 x 1 screws provide secure fastening and require no pre-drilling

9/16-18 x 4 1/2 Grade 5 Hex Cap Screw Plain Domestic USA (100)

7/16-14 x 2 3/4 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (50)

7/8 x 13 ITM SDS Max X-Cutter Hammer Drill Bit

3/8 inch reduced shank with ground flute of M2 high speed steel

5/8-11 x 6 Carriage Bolt 316 (A4) Stainless Steel fully-threaded These 1/4-14 x 1 screws5 8 11 x 6 Carriage Bolt 316 (A4) Stainless Steel is made from A4 316 Stainless Steel providing superior corrosion resistance and durability to ensure a long lasting product for outdoor and marine applications With a tensile strength of 80ksi, this bolt will provide a secure and strong hold for your application