M12 x 180mm Carriage Bolt

Carriage Bolt; cup square hex, 30mm mushroom head, BZP finish (Bright Zinc Plate). Designed for bolting through timber.

Square hex refers to the square section attached to the mushroom head, this sinks into timber and stops the bolt from spinning when the nut is tightened.

Supplied with one standard hex nut, washers sold separately.