Right Hand Spherical Rod end bearing, also known as a Heim joint (N. America) or Rose joint (U.K. and elsewhere)
Sizes available as follows… 5/16, 3/8, 7/16, 1/2, 5/8 and 3/4, also available 1/2 hole with 5/8 thread and 5/8 thread and 3/4 hole.
All of these are imperial sizing with matching thread shaft to rod end hole (with the exception of the 1/2 with a 7/16 hold, 5/8 which has a 1/2 hole and 3/4 with 5/8 hole.)