off the pressure source or bleeding the supply hose or conduit supplying body 10 upon the body 10 being fully connected to the part 51 the valve 28 will be displaced to the open position to the right sufficiently to permit fluid flow around the head 36 and through both coupling parts the connect against pressure coupling of the invention is illustrated in fig2 4 and as many of the components are identical to those previously described primed reference numerals have been used to indicate identical components which function in the aforedescribed manner the improvement includes the utilization of a shell spider 50 fixed within the body passage 12 39 and the shell 50 includes an enlarged portion 52 having an internal groove defined therein for receiving the annular elastomeric o ring 54 which sealingly engages the outer surface of the valve skirt 32 39 thus the seal 54 will prevent pressurized medium within the chamber 26 39 from entering the shell 50 openings 56 permit the flow of pressurized medium about shell 50 from passage 12 39 to chamber 26 39 and the closed end of the shell 50 is concentrically provided with threads 58 for receiving the ball cage 60 the end of the shell 50 is provided with an annular shoulder 62 which engages the check valve ball 64 in a sealing manner and the ball is biased into engagement with the annular shoulder 62 by the compression spring 66 which also bears upon the ball cage 60 thus the ball 64 comprises a unidirectional check valve permitting any fluid or pressurized medium within the shell 50 to pass therefrom into the passage 12 39 however flow of the pressurized medium from the interior.