Board Fit and Pin Count
The 641922-3 is a single-row header from the MTA-156 series, pitched at 0.156" (3.96mm) — a standard spacing that matches the MTA-156 receptacle family. The housing carries 8 positions but only 7 are loaded with pins; the eighth cavity is left empty. Before you commit this to a BOM, confirm that your circuit count is 7, or that the blank position is intentional for keying or a future option.
Retention and Vibration Resistance
In an industrial panel or general-purpose enclosure where the harness sees occasional shock or cable tug, this lock keeps the pair mated — it won't back out under moderate vibration.
Termination and Contact Details
Through-hole solder termination, with square male pins 0.400" (10.16mm) mating length and 0.125" (3.18mm) post length.