Model of SPC 06-03 is male connector stainless steel push in fitting which connects a female R, BSPT 3/8 thread to a 6 mm O.D tubing in the same direction. 6 mm tube x R, BSPT 3/8 SUS male straight push in fitting is composed of 316 stainless steel for corrosion resistance, FKM sealing material for chemical-resistance.