Fully assembled nut

3/4-10 x 2 1/2 Hex Cap Screw SS 18-8 (A2)

3/8 x 8 Hex Lag Screw 18-8 SS

pre-expanded anchor

3/8 x 2 1/2 Mushroom Spike Zinc Plated (25) 3/4-10 A307 Grade A Carriage Bolts Zinc Plated Fully assembled nut3 8 x 2 1 2 Mushroom Spike Zinc Plated (25) . 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