What are the definitions of fine and extra fine stranding?
I think the fine stranded conductor crimps are for PV systems or desil cable
F) Flexible, Fine-Stranded Cables. Flexible, fine-stranded cables shall be terminated only with terminals, lugs, devices, or connectors that are identified and listed for such use.
Flexible, fine-stranded cables (also known as welding cables or battery cables) have numerous, very fine strands and can be used only with specially tested, listed and identified terminations. The terminals, connectors, and crimp-on lugs found on most electrical equipment used in PV systems are not suitable for use with these types of cables.