1/2 x 2 3/4 Mushroom Spike Zinc Plated (50)

18-8 stainless steel offers good corrosion resistance and machines easily but will over time stain in coastal environments

Screws with a diameter over 1 ½ inches have a hardness rating of HRB 95 - HRC 35

5/8-11 x 12 Socket Cap Screw Alloy

Common flute and overall length for minimal adjustment during tool changes

2-4 1/2 x 6 Socket Cap Screw Alloy A563 Grade A Heavy Hex Nuts Plain 1/2 x 2 3/4 Mushroom2 4 1 2 x 6 Socket Cap Screw Alloy . Alloy Socket Head Cap Screws from Brighton Best. Hardness of RC 38 43, meets or exceeds ASTM A574. Manufactured from heat treated alloy steel, 1960 series.