9000-10-06

For tying two BSPP male connections together, this is the right style. It is a male BSPP to male BSPP Adaptall adapter, so both ends are BSPP male.

Both ends on this one are male BSPP, same thread type on each side, so it's a straight adapter meant to join two female BSPP ports together. No size change, no thread conversion. If you've got two female-threaded BSPP connections that need to be bridged, this is the piece that does it.