I purchased a genuine washer because I lost a 5.2 × 16 × 1.2 thick washer. The genuine product is 170 yen / piece, but this is 399 yen for 25 pieces. However, the ball has a slightly larger hole of 5.5 and is a ball. This is a special size and the outer diameter is larger than the hole. The effect is not expected with a small washer to hold the rubber mount.
Since the mounting screws and washers for each part of the truck are rusted, they are replaced in sequence. It is the best because it is stainless steel so it doesn't rust and is always beautiful. There is no particular problem with quality.