Abstract: A water spray nozzle for use with a pick box includes an elongate body member of circular section, and a head having a water discharge aperture with a water conveying passage communicating between the discharge aperture and a water inlet end of the passage. Intermediate the ends of the nozzle is a recess which can be engaged, in use, by a wire-like fastener adapted to latch the spray nozzle mechanically in a receiving bore of the pick box. A circumferential groove in the nozzle carries a resilient O-ring adapted, in use, to provide a water seal by engaging the receiving bore of the pick box.