uxcell M4x11.5mm Button Head Hex Socket Cap Screw Bolt Black 50pcs Drive Type: Hex Socket; Head Style: Button Head; Material: 10.9 Alloy Steel Package Content: 50(+/-2%)pcs x Button Head Screws; Product Name: Button Head Screws Thread Size: M4x12mm/0.16"x0.47"(D*L); Weight: 70g Thread Pitch: 0.7mm; Total Length: 14.5mm/0.57" Hex Socket Width: 2.5mm/0.1"; Head Size: 7.5x3mm/0.30"x0.0.12"(D*H)