Uxcell a15121600ux0663 M6x12mm Grade 8.8 Metric Serrated Hex Flange Screws Bolts (Pack of 50) Head Style: Hex Head; Material: Zinc Plated(Grade 8.8); Package Content: 50(+/-2%)pcs x Hex Flange Bolt Product Name: Hex Flange Bolt; Thread Size: M6x12mm/0.24"x0.47"(D*L); Weight: 303g Coating: Zinc; Main Color: Silver Tone; Total Length: 18mm/0.7"