M3 彈簧墊圈 | 18-8不鏽鋼 黑色氧化 (2000個/包)

Tried using these on a small robotics project where vibrations are constant, and they held everything in place perfectly. The stainless steel with black oxide gives them a nice finished look too.

The black oxide finish on these washers is surprisingly uniform across all 2000 pieces—no flaking or rough edges when I slid them onto the bolts. They’ve held up perfectly under a week of vibration testing on the motor mounts, which is exactly what I needed.

Exactly the right size for securing M3 fasteners on a small robotics project, and the black oxide finish hasn't flaked off after a few days of vibration testing. Pack of 2000 feels like a lifetime supply for my workbench.