Because high tension washers of chromate plated thing could not buy a small number of middle, I am very thankful to have purchased a few. I think that things themselves are good and unavoidable so that they can be used normally.
When high torque is applied with a washer with a general thickness, the retainer around the washer that protrudes from the nut becomes sweet, but since the high-tension washer has a thickness, it does not stick to the high-torque fastening of the bolt nut at all, surely Because it holds the matching of the flange part together with the gasket in diameter, it makes exhaust leakage as hard as possible and it is saved with a very reliable washer.
Since it is not near the place selling HITEN in the countryside, purchase with Monotaro san. There is no problem in terms of quality. I use it as a replacement part of a reinforcing system part of a car that needs strength. If you deliver it a little more quickly it is not complicated!