M8 x 20mm Hex Socket Set Cup Point Grub Screws Black 20pcs Drive Type: Hex Socket; Head Style: Hex Head Material: 12.9 Alloy Steel; Package Content: 20 x Grub Screws Product Name: Grub Screw; Thread Size: M8 x 20mm/0.3" x 0.8"(D*L) Weight: 106g; Main Color: Black Thread Pitch: 1.25mm; Width Across Flat: 4mm/0.16"