The 641991-2: This is a 7-position, single-row header from the MTA-156 series, with a 0.156" (3.96mm) pitch that sets the board footprint and the mating receptacle spacing. Only 6 positions are loaded — one cavity is empty, likely for keying or polarity alignment, so confirm the mating half's cavity count matches your harness layout. The shrouded-1 wall design and friction lock keep the header aligned and latched to the mating MTA-156 receptacle under vibration — a common need in industrial panel wiring and general-purpose equipment where the cable assembly sees movement.
Through-hole termination and contact finish
The contact length from mating face to board entry is 0.650" (16.51mm), giving a reasonable z-height for wire-to-board routing. The copper alloy base provides adequate conductivity for the current rating, which varies by wire gauge.
Lifecycle and sourcing posture
No stock-holding claim — quoted per RFQ.