6 pin Jones. (Cinch, Jones)

The Cinch Jones family covers an array of configurations, typically named after how many contacts they support. The compact variant of these insures correct polarity by either offset of blades (see 6 pin) or by rotating certain blades 90 degrees so the connector will mate one way only.

There is a larger variant that will often include a pin to insure correct polarity.

Both types are typically relegated to power supply or multi buss needs.

Amphenol connectors. These are super robust, military grade connectors. Expensive. The part number will tend to be followed by an S or P depending on sex, but I've seen ones without.

Amphenol 18-22

Amphenol 20-15

Amphenol 20-33

Amphenol 36-15