1 1/2-6 Slotted Hex Nut Zinc Plated fully-threaded which means you can use

which means you can use them when you work in the same wall without them coming loose

countersunk split drive anchor

3/16 x 2 Powers Round Toggle Bolt Zinc Plated (50)

Nuts are made from a low-carbon steel which conforms to the following chemical composition requirements: Carbon-0

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1 1/2-6 Slotted Hex Nut Zinc Plated fully-threaded which means you can use1 1 2 6 Slotted Hex Nut Zinc Plated . Hex nut with opposed slots cut into the top of the nut through the centers of the flats. The slots are on the end opposite the bearing surface. The slots are for the insertion of a cotter pin to secure the nut when used with a drilled shank fastener. Nuts are made from a low carbon steel which conforms to the following chemical composition requirements: Carbon 0. 47% max, Phosphorous 0. 12% max, Sulfur 0. 23% max.