Qualfast: M12X80 Carriage Bolt C/W Nut O/S Thread Hot Dip Galvanised Carriage Bolt, Metric Steel - Grade 4.6 HD GALV (Hot - Dip Galvanised) Carriage bolt with Nut & Oversize Thread DIN 603/555 MPN: M12X80 Carriage Bolt C/W Nut O/S Thread Hot Dip Galvanised Attributes: Box Quantity: 50 Driving Features: Self locking Grade: 4.6 Head Shape: Round Length: 80mm Material: Steel Standards Met: ISO 8677 BS4933 ASME B18.5.2.3M NF E25-402 DIN 603/555 (1987) Surface Treatment: Hot dip galvanized System of Measurement: Metric Thread: Metric Thread Direction: Right Thread Size: M12