well, then there you have it! 1.8mm OD and must fit 0.040" (inch) pins, which are what most opamp pins are. You have to see if you need a "tail" so that the sockets sits higher (if you have components under the opamp).
Based on the sizes, the one you posted should work, but you can also search the mill-max site by parameter to see if there are other models that will work. They also make sockets that fit 0.068" (1.73mm) which might be a bit safer if you're not sure the others will fit. Maybe you can ask for samples to test.