uxcell M8 x 20mm Stainless Steel Hex Socket Countersunk Flat Head Screw 10pcs Head Style: Countersunk; Material: 304 Stainless Steel; Package Content: 10pcs x Hex Socket Countersunk Screws Product Name: Hex Socket Countersunk Screws; Thread Size: M8/0.3"(D); Weight: 86g Drive Type: Hex Socket; Main Color: Silver Tone Thread Pitch: 1.25mm; Total Length: 20mm/0.8" Hex Socket Width: 5mm/0.2"; Head Size: 16x5mm/0.63"x0.2"(D*T)