Mining nozzle with two ring latch

A pick box having a sock et adapted to receive a water spray nozzle of the so-called rear entry type, comprising a cylindrical body member having a leading end and a trailing end, with a circumferential groove provided in said body member towards said trailing end, said groove housing firstly an inner, resiliently deformable ‘O’-ring, and secondly an outer, split spring steel latching ring, said ‘O’-ring being resiliently operable on said steel ring to bias said steel ring concentrically with said longitudinal axis of said nozzle, said socket having a forward end through which, in use, a water spray may be emitted, and a rearward end, wherein said rearward end is counterbored and tapped, into which is screwed a replaceable retainer sleeve incorporating a first inclined surface at an outer mouth of said retainer sleeve for gradual compression of said steel ring and of said ‘O’-ring, until an internal step of said retainer sleeve is reached with an increase in diameter after said step permitting radial expansion of said steel ring, and partial or complete decompression of said ‘O’-ring, to latch said nozzle in place, with said step providing second inclined surface along which said steel ring is adapted to ride, during nozzle extraction.