形如其名，将头部的方形颈部嵌入被连接件的槽中，减小突出表面的高度，从反面将螺钉拧紧。其多用在受力不大的地方，所以材料比较软。
大半圆头方颈螺栓 Cup head square neck bolts with large head-Product grade ; Cup head square neck bolts with large head
大半圆头方颈螺栓C级 Cup head square neck bolts with large head--Product grade
加强半圆头方颈螺栓 strong oval head square neck bolt
网片与立柱的连接采用半圆头方颈螺栓，配以防盗垫圈，能防止隔离栅被人为地随意拆卸。
Mesh column connection with the use of semi-circular bolt head square neck, with anti-theft rings and washers, to prevent the separation can be artificially demolition.
用多工位冷镦机生产半圆头方颈螺栓 ，对方颈部分的成形采用切挤成形工艺 ，用这种方法生产的产品 ，外形美观 ，质量稳定。
The cup head square neck bolts are made on the multiple station cold header, and cut squeeze technology is used to get the square neck.
半圆头低方颈螺栓。
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