Female quick-disconnect terminal, 0.187" tab, 16-20 AWG
The 1217580-1 is a non-insulated female quick-disconnect terminal from TE's Mark II series, accepting 16-20 AWG wire with a 0.187" (4.75mm) tab width and 0.025" (0.64mm) tab thickness. The tin-plated brass contact is terminated by crimp and mounts free-hanging in-line; overall length is 0.755" (19.18mm).
Tab width comparison within non-insulated female terminals
The 1217580-1's 0.187" tab width differs from the 0.248" (6.30mm) width of the 1-1659250-0 and the 0.250" (6.35mm) width of the 1-1627194-4 — both Utilux-series terminals accept similar wire gauges but require a wider mating tab.