the expansion mechanism compresses and exerts force against the walls of the hole

5/8-11 x 6 1/2 Flat Socket Cap Screw Alloy

00 x 320 Socket Cap Screw 12

providing much greater holding power than other self drilling anchors that are just a small screw in a larger screw

1/4-28 x 3/4 Grade 8 Hex Cap Screw Yellow Zinc Plated Domestic USA (2700) Flat Mushroom Toggle Bolts Zinc Plated the expansion mechanism compresses and1 4 28 x 3 4 Grade 8 Hex Cap Screw Yellow Zinc Plated Domestic USA (2700) . 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