You can buy as many zinc-plated mushroom Spike® fasteners as you need

1 1/8-7 x 5 A325 Type 1 Heavy Hex Bolt Plain (15)

3/8 Cobalt Heavy Duty Jobber Drill Bit

3/8-16 x 4 Grade 8 Hex Cap Screw Plain Domestic USA (250)

tamper-proof

1/2-13 x 6 Grade 8 Hex Cap Screw Yellow Zinc Plated Domestic USA (100) 3/4-10 Grade 8 Hex Cap Screws Plain - Domestic USA You can buy as many1 2 13 x 6 Grade 8 Hex Cap Screw Yellow Zinc Plated Domestic USA (100) . Grade 8 Hex Cap Screws are manufactured in the USA from medium carbon alloy steel. In diameters 1 4 to 1 1 2 inches our Grade 8 material meets or exceeds SAE J429 Grade 8 specifications. Diameters over 1 1 2 inches meet or exceed ASTM A354 Grade BD. All material is manufactured with rolled threads. Yellow zinc plated bolting will meet or exceed ASTM F1941. Typical hardness on