ITEM NAME:M3 x 45mm Alloy Steel Hex Socket Button Head Screws Black 20 Pcs C9B6 M3 x 45mm Alloy Steel Hex Socket Button Head Screws Black 20 Pcs C9B6 Product Name: Socket Button Head Screws Drive Type: Hex Socket Head Style: Button Head Material: Alloy Steel Thread Size: M3 x 45mm Weight: 20g Main Color: Black Total Length: 47mm/ 1.9 inch Head Diameter: 5.5mm/ 0.22 inch Alloy Steel material Socket Button Head Fastener Type: Machine Screw Package Content: 20 x Socket Button Head Screws Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.