6ANメスフレア to M10×1.0オスメトリック

Finally, a fitting that actually threads on smoothly without that initial crunchy feel. The machining is precise enough that I didn't have to fight it with a wrench.

The M10 threads were cut clean and bottomed out perfectly on my fuel rail adapter, so the sealing was dead-on from the first torque. Swapped this in to replace a crush washer setup and haven't seen a single drop since. Will grab a few more for the other lines.

Snug fit on the 6AN flare side, no weeping at the threads after a week of driving. The M10 x 1.0 end mated perfectly to my factory sensor port.