An anchor bolt with an eye nut is a type of fastener used to secure objects to a concrete or masonry surface. The anchor bolt consists of a threaded rod with a loop or eye nut on one end, and a wedge or expansion nut on the other end. The bolt is inserted into a pre-drilled hole in the concrete or masonry surface and secured by tightening the expansion nut, which causes the wedge to expand and grip the inside of the hole. The eye nut on the other end provides a secure attachment point for chains, ropes, or other fasteners used to secure the object being mounted.

Anchor bolts with eye nuts are commonly used in construction to secure equipment, machinery, or other heavy objects to a concrete floor or wall. They are also used in outdoor settings to anchor structures like playground equipment, fencing, or signs. The eye nut allows for easy attachment and detachment of the fasteners, making it a versatile and convenient solution for securing objects to concrete or masonry surfaces.