Low-wear screw structure

A low-wear screw structure including:

• a screw head comprising a top and a neck extending from the top and tapering away from the top;
• a rod body extending from the neck of the screw head, wherein the rod body comprises a rod extension part connected to the neck, a reaming part connected to the rod extension part and a taper part connected to an other side of the reaming part, wherein the rod extension part is provided with a first bottom diameter, and the reaming part is provided with a second bottom diameter;
• a first thread annularly arranged on an outer peripheral surface of the rod body at a distance from the taper part to the rod extension part through the reaming part;
• and
• at least a crushing rib, the crushing rib being arranged on the outer peripheral surface of the rod body at the reaming part, each crushing rib being provided with a first side surface and a second side surface;
• wherein the first thread at the reaming part being provided with a plurality of sawtooth cutting edges at an outer periphery;
• wherein a first included angle being formed between the first side surface of each crushing rib and the outer peripheral surface of the rod body at a cross section of the crushing rib and the rod body, a second included angle being formed between the second side surface of each crushing rib and the outer peripheral surface of the rod body at a cross section of the crushing rib and the rod body, and the first included angle being different from the second included angle.