ASTM A489 Type 1 Lifting Eye Bolts are forged, carbon steel threaded eye bolts intended for use with tapped holes that have been engineered as a lifting point. Dimensional specifications are governed by ASME B18.15 in sizes 1/4" through 2-1/2". According to ASME B30.26 - Rigging Hardware, each eye bolt shall be marked to show: 1. Name or trademark of manufacturer, 2. Size or rated load and 3. Grade for alloy eye bolts.