Close Length: about 11.5 MM (tight)

The nut color :black

The nut length:  7.5 mm (0.29")

The nut diameter:5 mm

 Nut  head diameter: 9.5 MM

Head thickness: 2.1 MM

The screw color: black or steel

The screw: M4 x 5mm

The screw head  diameter: 8.5 MM