Male Bspp X Male Npt Nipple

Built for exactly that adapter job, it has a 2 inch male BSPP thread on side 1 (G 2 - 11) and a 2 inch male NPTF thread on side 2 (2 - 11.5 NPTF), both in a straight steel nipple.

That's what this fitting handles. One end is 2" male BSPP (G 2-11 thread), the other is 2" male NPT (2-11.5 NPTF), so it connects those two thread standards directly without any intermediate adapter. Both sides are the same 2" size, so flow path stays consistent across the connection. Steel construction, and at 67.1mm overall length it's a fairly compact piece for what it's doing.

Designed to adapt BSPP to NPT connections, this steel nipple fitting should provide a solid, leak-free connection when properly installed. Just be sure both sides are torqued to the appropriate spec for your system.