The 770334-1: It's a single-row, panel-mount snap-in shell with a detent lock that holds the mated pair together under vibration — think wire-to-wire or wire-to-board harnesses in appliances, automotive interior, or industrial control panels where the connector sees occasional jostle but not constant flex.
Contacts Not Included — What You Actually Need
The listing explicitly notes Contacts Not Included. That's not a gotcha — it's standard for this series: the housing is a shell, and you order the crimp terminals separately. The housing accepts both male and female contacts, so it can serve as either the plug or receptacle half depending on which terminal you load. For the.062" diameter pin contacts, the typical TE mate is the 1-350820-1 (male pin) and 1-350819-1 (female socket), both crimp-terminated and sold in strip form for automatic or hand-tool application. No contacts ship with the housing — budget for them on the BOM line.
Active Production, RoHS Compliant
The 770334-1 is listed as Active with no end-of-life notice, and it carries RoHS compliance. That means it's still a standard catalog item — no last-time-buy clock ticking.