Automounting USB-UART/FIFO IC (as ttyUSB0) with 0666 permissions - udev - permissions

Question

I'm trying to automount the following device with 0666 permissions:
lsusb -vvv
Bus 001 Device 094: ID 0403:6014 Future Technology Devices International, Ltd FT232H Single HS USB-UART/FIFO IC
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x0403 Future Technology Devices International, Ltd
idProduct 0x6014 FT232H Single HS USB-UART/FIFO IC
bcdDevice 9.00
iManufacturer 1 FTDI
iProduct 2 C232HM-DDHSL-0
iSerial 3 FTVWEM02
bNumConfigurations 1
To achieve this I created the following udev rule in /etc/udev/rules.d
SUBSYSTEM=="usb", ATTR{idVendor}=="0403", ATTR{idProduct}=="6014", MODE="0666", RUN+="/usr/bin/touch /tmp/udev-test.txt"code here
As you can see I verify the functionality of the rule with a test file. The file is always created on the connection of the USB device.
-rw-r--r-- 1 root root 0 Oct 20 09:56 udev-test.txt
That should mean that the rule is functioning... however it never gets the permissions right.
When running ls -l /dev/ttyU* I get the following result:
crw-rw---- 1 root dialout 188, 0 Oct 20 09:56 /dev/ttyUSB0
Strangely enough if I run chmod from the command line as root, I can always change the permissions of the device. I would like that to happen on every plug-in automatically. Could you please help me?
I'm running Scientific Linux 7
Linux version 4.7.5-1.el7.elrepo.x86_64 (mockbuild#Build64R7) (gcc version 4.8.5 20150623 (Red Hat 4.8.5-4) (GCC) ) #1 SMP Sat Sep 24 11:54:29 EDT 2016
The topics I already searched through:
Udev rule is not being applied - solution not working
https://stackoverflow.com/questions/34116854/udev-created-my-symblic-link-to-my-device-but-permission-not-set
Change ttyUSB permissions using udev - if I add KERNEL=="ttyUSB*" or KERNEL=="ttyUSB0" the rule is not working anymore
Run script with udev after USB plugged in on RPi