750 Piece.425 Inch Zinc Plated Steel Tooth Lock Washers With Sharp Internal Teeth That Bite Down Hard For Zero Wiggle Room And Killer Anti Vibration Grip While Delivering Solid Electrical Grounding For Heavy Duty Shop Tasks

750 piece zinc tooth washers give steady reliable grip
✔️ Spring steel construction c40-c50 hardness asme b18 standards

These internal tooth lock washers sit right under fastener heads to stop bolts from backing off during heavy work. You will find them handy on machinery frames, auto repairs, and electronic boxes where shaking tends to loosen things up fast. The sharp ground teeth bite into soft metals or plastics to keep everything locked tighter while keeping a solid electrical connection.

✅ Inside hole measures 1.275 to 1.325 inch for standard bolts
✅ Outside width runs 1.921 to 1.975 inch across the face
✅ Thickness sits between 0.059 and 0.067 inch for firm clamping
✅ Rated rockwell c40 to c50 for long lasting structural strength
✅ Compliant with asme b18.21.1 for heavy industrial reliability

💡 What makes internal tooth lock washers a handy fix for shaking equipment?
These flat metal rings handle tricky mount jobs by biting down hard on stubborn hardware.
- Twisted edges grab bare stock to kill rattling noise on workshop benches
- Clear zinc shield stops surface corrosion from eating through cheap metal frames
- Solid metallic path channels static discharge away from sensitive wiring harnesses

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