

🔧 Seal the deal with copper confidence — never get caught without the perfect washer!
This 300-piece copper sealing ring assortment offers 12 metric sizes of flat washers made from high-quality red copper, known for exceptional heat resistance, conductivity, and corrosion resistance. Ideal for automotive, marine, electrical, and plumbing uses, these washers provide a reliable, tight seal to protect fasteners and materials. Packaged in a sturdy, compartmentalized case, this kit ensures easy access and organization for professionals and DIY enthusiasts alike.
| ASIN | B0C61TKSM6 |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 8,401 in DIY & Tools ( See Top 100 in DIY & Tools ) 40 in Washers |
| Customer Reviews | 4.7 4.7 out of 5 stars (505) |
| Cutting Diameter | 5 Millimetres |
| Date First Available | 23 May 2023 |
| Finish | Brushed |
| Head Style | Flat |
| Item Weight | 280 g |
| Item diameter | 5 Millimetres |
| Item model number | Tool11 |
| Item thickness | 1 Millimetres |
| Manufacturer | taobai |
| Material | Copper |
| Measurement System | Metric |
| Number of Pieces | 300 |
| Part number | Tool11 |
| Shape | Flat |
| Size | 5mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 20mm |
J**N
Good sizes.
Good quality cooper washers.
S**Y
Works great for sealing and maintenance jobs
I bought this copper washer assortment set to keep in my garage for general maintenance work, and it’s already come in handy several times. The box includes a nice range of sizes — everything from small M5s to larger M20s — all neatly sorted in individual compartments. The copper quality seems solid; the washers are evenly cut and have a clean surface finish with no burrs or bends. I’ve used a few on brake line fittings and oil drain plugs, and they sealed perfectly without needing to over-tighten. The storage box isn’t the strongest plastic, but it keeps everything organized. For the price, the amount and variety you get makes this kit great value. Pros: 12 common metric sizes, all clearly labeled Good sealing performance and fit Handy to have for car, plumbing, or hydraulic work Cons: Box latch feels a bit flimsy Overall, if you do your own repairs or just like having spare washers on hand, this set is worth it.
L**A
Copper washers
Brillant good value
S**T
Quality product
Arrived quickly quality product
M**B
Good selection
Good selection
M**E
Good price
Great for the price - handy for the tool cupboard
G**N
Highly recommended copper washer kit
Good value for money, would recommend
M**K
Copper washers
Handy to have a selection in the tool box reasonable quality used on several jobs already
P**.
Impeccable
J**S
Todas as unidades com espessura abaixo do anunciado, 1mm e 1,5mm são na realidade 0,85mm e 1,35mm. A medida anunciada M8x13x1 é M8x12x1, tem menos 1mm do diâmetro total. O total de unidades, 300pcs, está correto mas 3 medidas vieram com quantidades erradas, M6x10x1 30pcs(28) -2, M6x12x1 30pcs(31) +1 e M14x18x1 25pcs(26) +1. Caixa de qualidade fraca, chegou tudo misturado com alguns dos separadores a saírem do sítio.
A**O
ottime utilizzate molto per vari utilizzi
D**M
Sortiert / stabil/ und für die Unterlage der ölablassschraube perfekt
J**.
conforme
Trustpilot
3 weeks ago
2 months ago