uxcell M5x20mm 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: M5x20mm/0.2"x0.8"(D*L); Weight: 167g Thread Pitch: 0.8mm; Total Length: 22mm/0.87" Hex Socket Width: 3mm/0.12"; Head Size: 9.5x2mm/0.37"x0.08"(D*H)