Too add to this thread... some part numbers for AMP's Universal Power "UP" connectors:
Plug Housings:
2 pin = 176271-x
3 pin = 176272-x
4 pin = 176273-x
6 pin = 176274-x
8 pin = 176275-x
9 pin = 176276-x
10 pin = 176277-x
12 pin = 176278-x
15 pin = 176279-x
Free hanging receptacles (they call them cap housings):
2 pin = 176282-x
3 pin = 176283-x
4 pin = 176284-x
6 pin = 176285-x
8 pin = 176286-x
9 pin = 176287-x
10 pin = 176288-x
12 pin = 176289-x
15 pin = 176290-x
Panel mount receptacles:
2 pin = 176292-x
3 pin = 176293-x
4 pin = 176294-x
6 pin = 176295-x
8 pin = 176296-x
9 pin = 176297-x
10 pin = 176298-x
12 pin = 176299-x
15 pin = 176300-x
x in suffix = color.
1 = natural (white to tan), 2 = red, 4 = yellow, 6 = blue, 9 = black
Crimp contacts (loose piece):
Tin plated brass 16-20AWG pin ("tab") = 175154-1
Tin plated copper alloy 16-20AWG pin ("tab") = 175154-2
Tin plated brass 22-26AWG pin ("tab") = 175153-1
Tin plated copper alloy 22-26AWG pin ("tab") = 175153-2
Tin plated brass 16-20AWG socket = 175156-1
Tin plated copper alloy 16-20AWG socket = 175156-2
Tin plated brass 22-26AWG socket = 175155-1
Tin plated copper alloy 22-26AWG socket = 175155-2
Digikey carries a few of these connectors.
Ed