9 Positions, 4.20 mm Pitch — the BOM Anchor
The 640501-3: This is a 9-position, 3-row shrouded header with a 4.20 mm mating pitch and 4.20 mm row spacing — the footprint matches the standard MR series receptacle, and the 3-row layout keeps the connector width under 13.50 mm insulation height. The latch-lock fastening and 4-wall shrouding keep the header aligned with its mating receptacle and resist vibration-induced separation — a solid choice for wire-to-board harnesses in industrial cabinets or general-purpose equipment.