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

coarse thread similar to Swaneze™ screws

1/2-20 x 7 L9 Hex Cap Screw Yellow Zinc Plated Domestic USA (125)

10 x 1 Simpson Pancake-Head Screw - Square Drive 410 SS - Box (100)

5/16-18 x 5 Grade 8 Hex Cap Screw Yellow Zinc Plated Domestic USA (250) 1-14 Grade 5 Hex Cap Screws Zinc Plated You can buy as many5 16 18 x 5 Grade 8 Hex Cap Screw Yellow Zinc Plated Domestic USA (250) . 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