MS35338-45 | 軍規彈簧鎖緊墊圈 | 鋼（300/包）

The mil-spec stamping is clean and uniform across all 300, and the steel feels properly hardened — no bent edges or weak spots. I used them on a vibrating pump mount and nothing has backed out after a week of running. Exactly what I needed for a job where cheap washers would’ve failed.

Held up way better than the cheap hardware store stuff I used before, the steel is solid and the split actually bites into the bolt. Three hundred in the pack means I’ve got spares for every project for a while.

Bought these for a small engine rebuild and they seated perfectly under the bolt heads. The steel feels sturdy enough to handle heavy vibration without deforming.