The TE Connectivity 521844-1 is a power ring terminal accepting 12-16 AWG wire, terminated by a screw rather than a crimp. This is a field-serviceable interconnect — no crimp die or tooling needed, just a screwdriver and the right torque.
What wire and stud does this fit?
Wire gauge is 12-16 AWG, which covers the common power and battery cable range for industrial and automotive circuits. The ring terminal is sized for a specific stud diameter — the stud hole ID is not listed in the basic spec, but the 521844 base number and the power ring terminal type indicate a standard stud size. For the exact stud diameter, the product drawing is the authoritative source.