10000 PSI Fitting, SPX FITTING STR 3/8 NPTF M X 3/8 NPSM F

This fitting is designed for use with Power Team high-pressure hydraulic products. While it might physically connect to other brands, compatibility and performance at 10,000 PSI can't be guaranteed unless those brands also adhere to the Power Team fitting standards, especially regarding the 30° seat.

For Power Team high-pressure hydraulic products, part 9675 is a straight fitting with a 3/8 NPTF male end and a 3/8 NPSM female swivel end.

Yeah, that seat angle matters quite a bit with this one. The female swivel end on part 9675 uses a straight pipe thread with a 30 degree seat, so any male pipe fitting you thread into it needs to have that same internal 30 degree seat to get a proper seal. Most Power Team male fittings are built that way already, but parts 9687 and 9688 are the two exceptions, those won't seal correctly with this adapter. As long as you're not using either of those, you should be in good shape.