TECO N310 Series - Keypad together with Keypad box:

Chapter 6 Peripherals Components
6-7
(4) Keypad together with Keypad box :
1. Screw (M3)
2. N310 KeyPad Model
3. Fixing panel (t=1~6mm)
4. Inner screw (M3)
5. Keypad box（Type:4KA82X341W01）
6. Unit: mm
2-∅ 3.5 M3 nut fixation or,
2-M3 panel screw thread fixation