The single-row layout means all nine wires exit in one plane, which simplifies harness taping and breakout. The blue color is a visual key for line-side identification; it helps a harness builder distinguish this housing from other CT colors (red, white, black) on the same assembly.
Critical Procurement Note: Contacts Not Included
This housing ships empty. A common mistake on the harness floor is ordering only the housing and then stopping the line while contacts are expedited.
The 2-179228-9 gives you three more circuits in a narrower pitch — useful when the board or harness layout demands a denser wire bundle. Both use the same crimp termination style and free-hanging mount, so the tooling and assembly process carry over.