It uses a locking ramp fastening system — the ramp clicks over the mating receptacle latch and holds under vibration without a secondary lock. The housing is molded from polyetherimide (PEI), which gives it the -40°C to 150°C operating range you see on the spec line; that temperature envelope puts it in the same class as underhood automotive or industrial cabinet interconnects where standard nylon housings soften. That matters when you lay out the mating header footprint or build a custom harness jig: the contact centers are identical in both axes.
Mating Half and Contact Termination
It mates with the corresponding MultiCat receptacle housing (same series, opposite gender) that carries female crimp terminals. The Key B polarizing feature means this plug only mates with a Key B receptacle — mismatching key codes is physically blocked, which saves a harness re-pin if someone grabs the wrong variant off the shelf. The PEI housing withstands the higher crimp-force cycles and rework common in harness assembly without cracking.