5-position, 3.50mm pitch vertical header
The 1722871205: This is a 5-position, single-row, through-hole header from the Molex Ultra-Fit 172287 series, pitched at 3.50mm.
What mates and where it lands
This header is the board-mount half. The cable side is the Ultra-Fit receptacle housing (order separately) that accepts standard 3.50mm pitch crimp terminals. The post length is 0.126" (3.20mm) — enough for standard PCB thickness but check your board stack if you're using a thick backplane. The insulation height (11.80mm) clears most low-profile covers.