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Fish bolt

A metallic bar placed into a hole drilled in the ground, and fixed within it by means of an expansion agent (resin and/or mortar). One of the ends has a thread so that the distribution plate and the hold-down nut and/or wire drawing element can be fitted. It is used in conjunction with guniting for land contention and reinforcement. It can also be a metallic piece inserted into other pieces, like a dowel pin, with the aim of supporting them.

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Fish bolt