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This 325-piece assortment of premium red copper flat crush washers covers 10 metric sizes (M5 to M14), delivering durable, corrosion-resistant sealing solutions for automotive, industrial, and household applications. Packaged in a sturdy, transparent organizer with a size chart, it offers professional-grade reliability and convenience for every repair or DIY project.







| ASIN | B0CR8XPH5P |
| Best Sellers Rank | #1,332 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #3 in Flat Washers |
| Brand | AKOSN |
| Compatible Groove Diameter | 0.2 Inches |
| Customer Reviews | 4.6 out of 5 stars 751 Reviews |
| Exterior Finish | Copper |
| Fastener Size | M5, M6, M8, M10, M12, M14 |
| Fastener Type | Flat Washer |
| Finish Types | Copper |
| Item Dimensions | 5.35 x 3.81 x 0.7 inches |
| Item Thickness | 1-1.5 Millimeters |
| Manufacturer | AKOSN |
| Material | Copper |
| Material Type | Copper |
| Metal Type | Copper |
| Number of Pieces | 325 |
| Outside Diameter | 9-20 Millimeters |
| Part Number | Flat_Washer_001 |
| Screw Head Style | Flat |
| Size Name | Copper_Washers_325Pcs |
| Thread Size | Metric |
| Unit Count | 1.0 Count |
| Washer Type | Flat |
C**H
Good selections, plenty of each size.
A very comprehensive kit, with plenty of each size. Bought to have a stock of washers for my side gig of working on vehicles rather than having to go to the parts store and pay way more for just 1 at a time. The value should pay off in the long run for sure. These seem to be of good quality, and same dimensions as OEM washers of the same type.
B**N
Great Value
Nice and cheap. Don't have to spend $7 for two washers at the auto-parts store when this will last you years at less than twice the price on just 2 washers.
A**N
Great item to have on hand
Thinner in every dimension than what comes with a new brake caliper, but still works fine.
L**R
Crush washers
Understand that 50 percent of these washers are smaller but good product.
D**N
Nice variety
Helped me do some major rewiring on my car.
K**N
Durable and lots of sizes to fit all your vehicles
This kit is wonderful. I have several vehicles so there was a size for each one. These a the perfect thickness and a good value for the money.
B**A
Good and Cheap
Work well, haven't had any leaks or problems with them yet.
J**.
Perfect Kit for DIY Repairs!
This copper washer set is a lifesaver. With 10 sizes and 325 pieces, I’ve used it for oil changes, banjo bolts, and brake lines—no leaks at all. The copper is high quality and seals great. The case keeps everything organized, and it’s way cheaper than buying washers individually. A must-have for any garage!
Trustpilot
1 month ago
3 weeks ago