They are actually stronger than most metal and chemical anchors

3/4 x 7 Hex Lag Screw Zinc Plated

fine threads and the self drilling tip make these screws ideal for penetrating and holding into metal framing studs and other types of metal or aluminum framing

18% chromium and 8% nickel for good corrosion resistance

3/8-16 x 1 7/8 Hex Sleeve Anchor Zinc Plated (50)

3/4-16 x 4 1/2 Socket Cap Screw Alloy 5/8-11 A307 Grade A Carriage Bolts Hot Dipped Galvanized They are actually stronger than3 4 16 x 4 1 2 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.