?扁圆顶埋头螺丝钉

... 平顶埋头螺钉 flat counter-sunk head screw 扁圆顶埋头螺丝钉 oval countersunk screw 埋头螺栓 carriage bolt; countersink bolt; countersink head bolt; countersunk head bolt; dormant bolt; drop bolt; flush bolt; flush headed bolt; flush-headed bolt; in-6rd-senk-shr; patch bolt ...