Secure something to metal.
This is the most used screws to secure main board
Width/Length: 3 mm / 4 mm
Epson Symbol: NA
Material: ZincĀ
Epson Part Number: C.B.S-TITE SCREW 3x6 F/ZN-3C
Recommended Torque: 6+/- 1 kgf.cm
Package include: 3 screws.