One of the mounting holes on the contact surface (tongue part) is open, and it is a bare crimping terminal that can be attached without removing the screw completely.
For connecting mild steel strands or single wires.
Specifications
Electric Cable conjugated range from line mm 2:1.04 - 2.63
Electric Cable conjugated range AWG: 16-14
Length (mm): 16.0
stud diameter (mm): 4.3
JIS Standard: x
Inside dimension (mm): 2.3
Electric Cable conjugated range 1-line mm: 1.14 - 1.82
Outer dimensions (mm): 8.0
color: Silver
to open type, single Correspond Type
Conform Tool: bare Crimp terminal, Sleeve Tool for
Material/finish: terminal: No Oxygen copper (C1020)/Electric Tin Plating