Real Deal Three Eighth Inch Tooth Lock Washers With External Internal Combination Design And Durable Zinc Coated Steel Finish Engineered For Tough Construction Jobs That Pack A Punch And Deliver Serious Reliability Every Single Time

Premium 3/8 Zinc Lock Washers For Heavy Use
✔️ Heavy duty zinc steel washers match precise engineering tolerances

These combination lock washers feature a unique toothed ridge on both sides to bite into nuts and surfaces, keeping fasteners from backing off during vibration. You will usually find them on construction equipment, automotive assemblies, and heavy machinery where shifting loads demand serious holding power.

✅ 3/8 inch nominal bore size
✅ External and internal tooth pattern
✅ Zinc plated corrosion resistance
✅ Hardness rating between C40 and C50
✅ Single piece sold unless noted otherwise

💡 What makes combination lock washers so handy for shaky rigs and rough job sites?

These rugged locking plates bite into surrounding metal to kill slack.
- The split tooth profile grips both nut and frame simultaneously
- The zinc finish blocks rust even when exposed to wet conditions
- The heat treated core delivers C40 to C50 tensile strength
- Standardized shank measurements align perfectly with common hardware✝️