Steel Adapter, M30 x 1.5 Male Komatsu Plug

This steel adapter is made to fit Komatsu and Kobelco fittings. It's got an M30 x 1.5 male Komatsu plug, so if that matches your needs, you should be good to go.

For an M30 x 1.5 male thread application on Komatsu or Kobelco equipment, yes, that's exactly what this adapter is spec'd for. It's a steel male Komatsu plug under the Adaptall catalog number C1FD54, and the thread spec lines up with what you described. Just confirm your port side matches before ordering.