Board-to-board connectors often have 2 fitting nails (name depends on vendor), e.g. Molex 505066-0622:
The product specification includes many properties of those fitting nails, e.g. contact resistance:
Does this mean that fitting nails can be used as regular pins? So a 6 pin connector such as Molex 505066-0622 has in fact 8 pins? Also as the contact resistance of the fitting nails is lower, they are even better suited for transmitting power?