The Hillman Group 260218 1/4-Inch x 2-Inch Elevator Bolt, 100-Pack , Gray
Elevator Bolts have a square neck which resists turning when the nut is tightened or removed and a large head which provides a greater bearing surface for soft materials. Originally designed for attaching elevator buckets to conveyer belts. Similar to a carriage bolt, except the head is thin and flat.