uxcell M5 x 16mm Alloy Steel Hex Socket Button Head Screws Black 20Pcs Drive Type: Hex Socket; Head Style: Button Head; Material: Alloy Steel Package Content: 20 x Socket Button Head Screws; Product Name: Socket Button Head Screws; Thread Size: 5(M5) x 16mm/ 0.2" x 0.6"(D*L) Weight: 54g; Main Color: Black Total Length: 19mm/ 0.75"; Tensile Strength: 10.9 Head Diameter: 9mm/ 0.35"; Hex Key Size: 3mm/ 0.12"