KEYSTONE Electronics has released colour-coded screws and PC screw terminals. They are available from NPA .
The screws are available in red, black, white, blue, green, yellow, and clear. Rather than tin plating brass screws, Keystone applies zinc plating and a chromate conversion coating to absorb the required colours. They have combination drive heads and in 6.3mm lengths with 6-32 threads.
When used in conjunction with Keystone's PC terminals, they are economical alternatives to PC screw-type edge connectors. They also avoid the need for typically silk-screening connection types directly onto the board.