Uxcell a15101300ux0124 M6x16mm Hex Socket Machine Screw Countersunk Round Head Bolts (Pack of 20) Drive Type: Hex Socket; Head Style: Round Head; Material: 304 Stainless Steel Package Content: 20 x Countersunk Bolts; Product Name: Countersunk Bolt; Thread Size: M6 x 16mm(D*L) Weight: 80g; Main Color: Silver Tone Thread Pitch: 1mm; Total Length: 19mm/ 0.75" Head Size: 10 x 3mm/0.4" x 0.12"(D*T); Width Across Flat (S): 4mm/ 0.16"