M5 x 20mm 12.9 Alloy Steel Hex Socket Head Cap Screws Bolt Black 30pcs Drive Type: Hex Socket; Head Style: Hex Head; Material: 12.9 Alloy Steel Package Content: 30 x Socket Head Cap Screw; Product Name: Socket Head Cap Screw; Thread Size: (dxL)M5 x 20mm/ 0.2" x 0.8"(D*L) Weight: 120g; Main Color: Black Thread Pitch: 0.8mm; Total Length: (L1) 25mm/ 1" Head Size: (Dxk) 8 x 5mm/0.3" x 0.2"(D*H); Width Across Flat (s): 4mm/0.16"