Subsea hydraulic coupler

A subsea stab plate assembly comprising:

• a stab plate which includes a multiplicity of apertures each extending in an axial direction through the stab plate from a front face of the plate to a rear face of the plate;
• and
• a subsea hydraulic coupler for insertion through at least one of said apertures, the coupler comprising:
• a body having an internal longitudinal passageway including a valve operable to open the passageway on the mating of the coupler with a complementary coupler;
• wherein said coupler is shaped for insertion through the said one of said apertures in either of two directions, the body having a circumferential groove and a flange assembly comprising an axially extending hub which fits into the groove and a shoulder for abutment against said front face of the plate;
• and
• wherein the flange assembly comprises a plurality of separable segments each of which constitutes part of said hub and part of said shoulder.