6-position, dual-row, 4.20mm pitch — BOM-fit anchor
The 640500-5 is a 6-position, 2-row shrouded header from TE's MR (Miniature Rectangular) series, on a 4.20mm pitch. The latch-lock fastening and full 4-wall shroud protect pins and resist vibration-induced disconnection in harnesses routed inside enclosures or panel-mounted equipment. Style is board-to-cable/wire, meaning it terminates a wire harness to a PCB via the through-hole solder tails.
Peer alternative: 1318699-3 — higher density, gold contacts
The closest functional second-source within the MR family is 1318699-3: 12 positions in 4 rows, same 4.20mm pitch and latch-lock fastening, but with gold-plated mating contacts (3.00µin) instead of tin. The 640500-5 carries 6A per circuit; the 1318699-3 is rated 5A — the gold interface trades a small current reduction for higher mating cycle life and corrosion resistance.