uxcell M6x40mm Hex Socket Machine Screw Countersunk Round Head Bolts 10PCS Drive Type: Hex Socket; Head Style: Round Head; Material: 304 Stainless Steel Package Content: 10 x Countersunk Bolts; Product Name: Countersunk Bolt; Thread Size: M6 x 40mm(D*L) Weight: 81g; Main Color: Silver Tone Thread Pitch: 1mm; Total Length: 43mm/ 1.7" Head Size: 10 x 3mm/0.4" x 0.12"(D*T); Width Across Flat (S): 4mm/ 0.16"