304 Stainless Steel Pop Rivet Backup Washers Kit With Storage Box For 5mm Rivets
✔️ 200 deburred, corrosion-resistant washers in a reusable box
These backup washers are made from genuine 304 stainless steel to resist rust and corrosion, making them ideal for outdoor, marine environments and damp spaces such as garages and basements. The kit includes a bulk set neatly organized in a sturdy storage box, perfect for workshop projects, boats, trailers, or home DIY.
| Outer diameter | 12.7 mm | 0.5 in |
| Inner diameter | 5.3 mm | 0.21 in |
✅ Outer diameter 12.7 mm (0.5 in) and inner diameter 5.3 mm (0.21 in) for precise fit on M5 rivets
✅ Thick, load-distributing design prevents pull-through on metal, plastic, or wood
✅ 200 washers packaged in a reusable storage box for easy transport
✅ Rust-resistant 304 stainless steel stands up to outdoor, marine, and damp areas
✅ Great for reinforcing joints on automotive panels, boat fittings, gutters, HVAC ducts, and shelving
💡 What is a rivet backing washer used for? Rivet backing washers are handy for spreading load and preventing pull-through across fastened joints.
- Handy for automotive panels, boat fittings, shelving, HVAC
- Keeps rivets from pulling through under vibration
- Resists corrosion with 304 stainless steel
- Works well with 5mm pop rivets in repair and fabrication