18-24 AWG tin-plated socket
The 3-640707-1 is a tin-plated SL-156 crimp socket rated for 18-24 AWG wire, terminated by crimp and supplied in bulk.
Wire gauge range and sibling contacts
The 3-640707-1 covers 18-24 AWG; the 929989-8 sibling socket (also tin, active) covers 17-20 AWG, and the 1-1326032-0 covers 16 AWG with a thinner 31.5µin (0.80µm) tin finish — select the contact by wire gauge and finish thickness.
