Screw Eyes, or Eye Screws are similar to but smaller than Eye Bolts, but the machine screw thread is replaced by a wood screw thread. They are used in light-duty applications for screwing into wood or plastic to attach pictures etc.
Eye Screws Diameters
Eye Screws are available on the FCH Network with Imperial/US diameters that range from #1 to 2 1/4 and with Metric diameters that range from M4 to 2 1/4. The length of Eye Screws is usually measured from the point to the underside of the head.