The carbon steel pin and mushroom head configuration make this anchor tamper resistant

1-14 x 3 1/2 Socket Cap Screw Alloy

1 1/2-12 Nylon Insert Locknut Zinc Plated

The zinc plating provides a protective layer that enhances resistance against moisture

3/16 x 1 1/2 Mushroom Spike Zinc Plated (100) Finished Hex Nuts Silicon Bronze The carbon steel pin and3 16 x 1 1 2 Mushroom Spike Zinc Plated (100) . The Spike anchor is a patented, one piece, tamper proof, vibration resistant anchor for use in concrete, block, brick or stone. Several head styles and anchor materials are available. The Spike anchor is formed with an "s" shaped configuration at the working end of the anchor to create an expansion mechanism. Since the anchor is pre expanded, there is no secondary tightening operation required which