13W3 is an analog video connector commonly found on older Sun Microsystems, Silicon Graphics workstations and some Apple Computer displays.

The BNC connector is commonly found on professional video connections. Other applications include amateur radio antenna connections, aviation electronics and on electronic test equipment.

13W3 Female to 5 x BNC Male Cable is used to connect and extend from a BNC source to a Sun monitor with a built-in 13W3 cable