• Bullet, flat pad three combination screw

• 弹、平垫三组合螺丝

• Square pad three combination screw

• 四方垫三组合螺丝

• Three combination screw

• 三组合螺丝

• Combination screw

• 组合螺丝

• Cylindrical hexagon bolt

• 圆柱内六角螺栓