Receptacle housing for 0.250" quick-connect terminals
The 521204-6: The nylon housing is blue, free hanging (in-line) mounted, and stacks top to bottom.
Position count across the Mark III series
The 521204-6's 2 positions match the 521204-2 (2-position, bulk) and 521204-1 (2-position, box) — all share the same 0.250" terminal size, nylon material, blue color, and free-hanging mount. For 3-position requirements the 521205-9 carries the same terminal size, material, and mount style.
