M6 x 45mm Hex Socket Countersunk Flat Head Screw Bolts 20PCS Head Style: Countersunk; Material: 10.9 Alloy Steel; Package Content: 20 x Countersunk Bolts Product Name: Countersunk Bolt; Thread Size: (d x L1) M6 x 20mm/ 0.24" x 0.8"; Weight: 188g Drive Type: Hex Socket; Main Color: Black Thread Pitch: 1mm; Total Length: ( L ) 45mm/ 1.8" Head Size: (D x T) 12 x 4mm/0.47" x 0.16"(D*T); Width Across Flat (S): 4mm/ 0.16"