3/8 Inch Heavy Duty Bonded Sealing Washers With Rock Solid Vulcanized Rubber Face Zinc Plated Steel Job Site Staple Hardware Bulk Pack Of Six Thousand Pieces For No Fuss Weather Seals On Bolts And Nuts

Heavy duty 3/8 inch zinc seal washers with rubber face
✔️ Stamped flat zinc coated seal washers sized for 3/8 fasteners

These heavy duty bonded sealing washers combine a sturdy zinc plated steel base with a vulcanized rubber layer to block moisture and dust effectively. You will typically mount them on exterior structural bolts, roof rafters, or outdoor equipment frames where weather resistant fastening matters most. This bulk supply keeps your job site supplied without constant reorder trips.

✅ Vulcanized rubber face prevents water intrusion around bolt holes
✅ Clean deburred edges ensure smooth seating under hex nuts and flanges
✅ Zinc plating delivers reliable corrosion resistance for outdoor exposure

💡 What makes a sealed mounting washer handy for securing outdoor hardware?
- A bonded design merges a rigid metal plate with a compressible rubber gasket to stop leaks before they start
- Standardized inner diameters slide straight onto standard 3/8 inch bolts without needing extra adapters
- Galvanized coatings hold up against rain and humidity so your structural connections stay tight year round