Eowpower 140 Pieces 8 Sizes Copper Metric Sealing Washers Assortment Set

I bought this set mainly for the M14x20x1.5 washers. The first three I pulled out of the case all had defects. Two were gouged and the third was crushed oblong and no longer flat. I looked through the rest and found another that was gouged. That means nearly a third of all 15 washers in this size had defects.Even with the defects, this is still more cost effective than going to the auto parts store.

I have been using Dorman's 14mm copper washers for my cars and motorcycles. I happened to see this on Amazon and I gave it a try. I measured a random 14mm Dorman copper washers with a digital caliper and the variations along the rim of the washers was about 0.06 mm (from lowest of 1.15mm to a highest of 1.21mm with a variation of thickness of 0.06mm) I measured the Eowpower's 14mm washers and the lowest was from 1.14 mm to a highest of 1.16 mm for a variation of 0.02mm). I'm impressed.

These things are incredibly misshapen and poorly manufactured - far from even or straight. I bought these for a specific size since the price was the same for various sizes and thought it might be handy to have, but I might as well throw the entire box in the garbage. I wouldn't trust my life to them and that is exactly what I needed them for (brake line banjo bolt washers). Would rather re-use the old ones than these.

Such a great little comprehensive kit. Almost every size you could want and multiples. All the rings have a great finish and I couldn’t find any blemishes or nicks on any of them. Great purchase!!

They're copper crush washers. Just what it says on the tin. Decent variety of sizes for basic applications.I used mine to seal banjo bolts and oil fittings on a turbo/engine. No leaks so far. That's nice