500 Pcs Black Star Lock Washers Set With Internal Teeth Grip For Vibration Resistance Plum Flower Shape Bearing Retaining Rings Grab-and-Go Heavy Duty Fit For M2.5 To M12 Metric Fasteners

500-Piece Black Plum Flower Star Washers with Internal Teeth
✔️ Heavy-duty hardened steel, internal teeth bite for vibration lock

These plum flower star washers feature internal teeth that bite into the shaft and a rigid hardened-steel core for reliable grip. They’re designed to resist loosening from vibration in assemblies using metric fasteners from M2.5 to M12, making them ideal for automotive, machinery, and industrial equipment.

✅ Internal teeth grip bites into shaft to resist vibration-induced loosening
✅ Rigid hardened steel core maintains tooth geometry under high clamp
✅ Uniform inner diameter provides consistent fit across M2.5-M12 shafts
✅ Reusable design lets you remove and re-install without losing bite
✅ Plum flower star shape distributes load for durable grip

💡 What is a star lock washer used for in vibration-prone assemblies?

They’re handy for securing fasteners in moving machines where vibration can loosen parts over time.

- Improves locking by embedding teeth into shaft surfaces - Works with metric fasteners from M2.5 to M12 - Reusable for maintenance without losing bite - Made from hardened steel for long life
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