Pneuflex's model of SPOC 06-04 is hex socket head male straight stainless steel push to connect fittings with 6mm O.D connector and R, PT, BSPT 1/2 male thread, round shaped body with internal hexagon, of which tough stainless steel construction can withstand aggressive environment, designed to connect pneumatic tubing of 6mm diameter to R, PT, BSPT 1/2 female thread in where the installation space is limited.