uxcell M2 x 4mm Hex Socket Countersunk Flat Head Screw Bolts 50pcs Drive Type: Hex Socket; Head Style: Flat Head; Material: 304 Stainless Steel Package Content: 50(+/-2%)x Countersunk Bolts; Product Name: Countersunk Bolt; Thread Size: M2 x 2mm/0.08" x 0.08" Weight: 8g; Main Color: Silver Tone Thread Pitch: 0.35mm; Total Length: 4mm/0.16" Head Size: 3.8 x 2mm/0.15" x 0.08(D*T); Width Across Flat: 1.5mm/0.06"