The TE Connectivity AMPSEAL 16 1717677-1 is a 12-circuit, 2-row receptacle housing from the AMPSEAL 16 series. The 4.50 mm pitch and 5.30 mm row spacing give enough room for 16-20 AWG wire with the proper seal.
The seal integrity depends on using the proper wire-seal and interface-seal components from the series; without them, the IP67 rating is not achieved. This makes the 1717677-1 a straight choice for engine-bay harnesses, outdoor lighting, agricultural equipment, or any washdown environment where a standard unsealed header would fail from moisture ingress.
The listing explicitly notes that contacts are not included. For a complete mated pair, you will also need the matching AMPSEAL 16 plug housing and the female socket terminals.