Although a little less common than the UNC version (check out the standard S-279 Machinery Eye Bolts
for imperial sizes), these eye bolts are still well-known and widely used for those needing metric threads. They are made from forged steel, Quenched and Tempered. They are fatigue rated at 1-1/2 times the Working Load Limit (ratings are for in-line pulls only, capacities are reduced with angular loads). These eye bolts also meet all requirements of ASME B30.26. Safety factor of 5:1.