MS35333-72 | حلقات قفل داخلية مسننة حسب المواصفات العسكرية | فولاذ (1000 / عبوة)

Installed these on a couple of mounting brackets in my garage and they held rock solid through a week of heavy power tool vibration. The steel feels properly hardened, and the internal teeth bite into the surface noticeably better than the flat washers I had before. All 1000 arrived clean and unifor

Pulled one out to test the grip on a steel bolt and those internal teeth really bite down firm. A full thousand pieces in the bag means I won't be running out anytime soon, and the mil-spec stamp gives me confidence for the vibration-heavy spots.

Installed these on a bracket that sees heavy vibration, and the lock washers haven't budged at all. The steel feels nicely sturdy, and the internal teeth really bite into the fastener head.