Mark II QC receptacle, 0.250" tab
The 170454-1 is the female quick-disconnect receptacle in TE's Mark II series, accepting 0.250" (6.35mm) male tabs. It crimps onto 14-18 AWG wire and uses a brass contact with a 0.032" (0.81mm) tab thickness. Non-insulated; free-hanging in-line mounting.
