








🔧 Seal the deal with copper precision – because your projects deserve the best!
This 150-piece copper washer assortment features 8 metric sizes (M6 to M20) designed for superior sealing performance. Made from high-quality copper, these washers offer excellent heat resistance, corrosion protection, and electrical conductivity. Their smooth finish minimizes friction and leakage, making them perfect for automotive, marine, electrical, and hydraulic applications. A must-have kit for professionals who demand reliability and versatility.
| ASIN | B07H299LZM |
| Best Sellers Rank | #117,222 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #15 in Sealing Washers |
| Brand | HELIFOUNER |
| Color | Copper |
| Compatible Groove Diameter | 2E+1 Millimeters |
| Customer Reviews | 4.6 out of 5 stars 423 Reviews |
| Exterior Finish | Copper |
| Exterior finish | Copper |
| Fastener Size | M6 M8 M10 M12 M14 M16 M18 M20 |
| Fastener Type | Flat |
| Fastener size | M6 M8 M10 M12 M14 M16 M18 M20 |
| Finish Types | Copper |
| Item Diameter | 6 Millimeters |
| Item Thickness | 1 Millimeters |
| Item Weight | 0.25 Kilograms |
| Item thickness | 1 Millimeters |
| Manufacturer | HELIFOUNER |
| Material | Copper |
| Material Type | Copper |
| Metal Type | Alloy Steel, Copper |
| Model | SLKRWASHER-COPPER--150P |
| Number Of Items | 150 |
| Number of Pieces | 150 |
| Outside Diameter | 26 Millimeters |
| Outside diameter | 26 Millimeters |
| Part Number | SLKRWASHER-COPPER--150P |
| Screw Head Style | Flat |
| Set Name | 8 Sizes |
| Size Name | 6 mm |
| Thread Size | M20 |
| UPC | 781573059465 |
| Unit Count | 1 Count |
| Washer Application | automotive, electrical connections, marine |
| Washer Compatibility | metric bolts |
| Washer Type | Flat |
| Washer type | Flat |
A**S
A must have for every DIY’er.
Very important buy if you work on your own car, can be used is place of drain plug or fill plug as needed. Multiple sizes for multiple auto brand options.
R**D
Pure copper and will tarnish as expected
I use the copper washers for jewellery making and wanted pure copper that I can treat with liver of sulphur to age and tarnish. I can confirm that these rings will tarnish and the effects I've achieved are as exp.
M**R
good.
Many sizes.
T**N
Good quality and good value
I needed just a couple, but this was a good value and since I bought the set, I have used more than just a couple....They serve more than one application and seal very well....If you're doing anything mechanical, you'll run into a need for these sooner than later and pay twice as much for fewer at the stores...Bottom line, g good buy.
Y**T
Bon kit de joint
Pour écrou de panne à l’huile
Trustpilot
2 months ago
3 days ago