Elevator Bolts have a square neck that resists turning when a nut is tightened or removed. The large, flat head provides a greater bearing surface for soft materials. Variants included in this assortment feature a coarse 1/4"-20 thread size. Full assortments of #46253 contain ten (10) refills comprised of Hillman item numbers #4750 - #4752, #398484, #398486, and #398488. Full assortments of #46253 contain two (2) refill boxes of items #4750 - #4752 and #398484.