墊圈，導螺桿，桌上型車床

Fiddly little thing to locate on the parts diagram, but this washer sits perfectly against the bearing lock nuts and threads onto the lead screw with zero wobble. My bench lathe runs smoother now without that annoying axial play.

Exact match to the SC4-75 spec, so no fiddling with fitment on the lead screw assembly. Machined cleanly and sits flush against the bearing lock nut, which is exactly what I needed.

Arrived quickly and matched the part number exactly, which was a relief since the diagram is a bit vague. The washer sits flush against the bearing lock nut without any play, so the lead screw assembly feels solid now.