I can give you these part numbers that work on Mouser.
1. Male gold pin terminal 66099-3
2. Female gold receptical terminal 66101-3
3. Flanged, male quick-thread plastic connector female internals (fitted with male pins) 206061-1
4. Circular connector with swivel nut to mate with above connector (uses female receptacle terminals) 206060-1
None of these appears to be the specific flange connector you're after but by searching the above connector numbers on Mouser, you can usually find the mating connector part number under "related items" on the connector page. If you have the option, you could buy one of each of the connectors I listed above and they will mate. It's just the reversed gender from what you're looking for.
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