汽缸頂部螺絲

Snapped right onto the cylinder top and feels as solid as the original part. The fit is snug with no wobble, which is exactly what I needed from a spare.

The threading is precise enough that it seats snugly without any wobble once tightened, which is exactly what I needed for keeping the cylinder assembly stable. It's a solid OEM-style replacement that does the job quietly.

Took a bit of fiddling to line up, but once it's seated the threads catch cleanly and the cylinder assembly holds firm again. It's clearly cut to spec since it fit my device without any wobble.