Abstract: A device for assembling an element, such as a washer, to the end of a fastener, such as a bolt, in a reliable, high-speed fashion wherein the assembling device includes the washers being supplied in a position to be picked up by an end of the shank of the bolt and slides along a ramp causing the washer to be positioned closer to the head of the bolt. The bolts are supplied to the assembling machine in an upright, in-line position. The bolts are conveyed through the assembling machine utilizing a screw having a thread designed to receive a portion of the shank of the bolt within the thread and cause the bolt to catch the hole of the washer and be assembled therewith into the assembled bolt and washer.