A fastener eye nut hook nut is a type of mechanical fastener used to secure or attach two or more objects together. It is designed to be screwed onto a threaded bolt or rod and provides a loop or eyelet for attaching a rope, cable, or other hardware.

The eye nut is usually made of metal such as steel or stainless steel and comes in various sizes and shapes depending on the specific application. It is commonly used in lifting and rigging applications where a secure attachment point is required, such as in hoisting equipment, crane rigging, or in the construction industry.

Eye nuts can be installed manually or with the use of tools such as pliers, wrenches, or sockets. It is important to follow the manufacturer’s instructions for proper installation and use to ensure the eye nut is used safely and effectively.

Overall, fastener eye nuts are useful in any application where a load needs to be securely attached to a lifting or rigging device. It is important to select the appropriate eye nut based on the load capacity and intended use to ensure safe and reliable performance.