4mm x 40mm Threaded Hexagon Head Self Tapping Screws 50 Pcs Head Style: Hex Head; Material: Carbon Steel; Package Content: 50 (+/-2%) x Self Tapping Screws Product Name: Self Tapping Screw; Thread Size: 4mm x 40mm/0.16" x 2"(D*L); Weight: 153g Drive Type: Hex Socket; Main Color: Black; Overall Size: 44mm/1.7"(length) Pitch: 1.5mm; Head Diameter: 6mm/0.24" Head Height: 4mm/0.16"; Hex Width: 3mm/0.12"