The Molex 1729521601 is a 16-circuit, dual-row receptacle housing from the Micro-Fit 3.0 172952 series.
The 16 positions in a 2-row layout. Contacts are not included.
This receptacle mates with any Micro-Fit 3.0 pin header of the same circuit count and pitch — the recommended mating half is a 16-circuit, dual-row, 3.00 mm pitch header from the same series. The free-hanging design suits in-line harness splices or panel-mount applications where the housing clips into a mounting peg.
The base product number 172952 covers the full Micro-Fit 3.0 housing family, so a 16-circuit variant is the standard offering.