What This 6-Position Grace Inertia Plug Housing Does in a Harness
The housing is a shell only — the spec note reads Contacts Not Included. You must source the matching Grace Inertia female crimp terminals separately. The PA66 insulation material is a standard nylon 6/6, which absorbs some moisture but holds up well in dry interior environments.
How the Red Housing Differs from Other Colors in the Series
Against the yellow 6-1971793-4, the blue 6-1971793-2, and the natural 6-1971793-1, this red version gives you a visual key for harness assembly. If your BOM already specifies a color code for wire-to-wire connectors, pick the one that matches your harness drawing; otherwise, any of the four will work with the same pitch, latch lock, and crimp terminal.