I was saved because neither the home nutrition in the neighborhood which is said to have good product selection was troubled because the cap nut of wit screw could not be obtained. Repair of the suitcase was expensive and we could not get the same caster, so I bought a screwed caster here. If it is not a cap nut, the stored matter will get caught or it will get scratched and so we have to necessarily have a cap nut. The surface was made clean with stainless steel and the screw street was also smooth. As for the large diameter flat washer and the spring washer, since only a large number of packs were found here, we purchased the approximate value M10 for the nearby home center. I think that it was good to be repaired at a low price because it is a suitcase with a thought.