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When drilling for a 1-1/4 inch wedge anchor, the drill bit size should be slightly smaller than the anchor's diameter to create the proper mating surface. The rule of thumb is to use a drill bit that is about 1/8 inch less than the anchor's nominal size. Thus, for a 1-1/4 inch wedge anchor, you would need a 1-1/8 inch (1.0625 inches) drill bit0625 inches) drill bit0625 inches) drill bit0625 inches) drill bit1 4 wedge anchor drill bit size. This allows the anchor to expand fully within the hole, providing maximum holding power.

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HEBEI YUETONG FASTENERS ss nuts