Ma washers a masika amagwiritsidwa ntchito kuti ateteze kumasula, ma washer ophwanyika alibe ntchito yopumula, ndiko kuti, ma washers osalala amangowonjezera malo olumikizana, ndipo otsuka masika amatha kupewa kumasula.
Mapadi athyathyathya: ingowonjezerani malo kuti mupewe kuwonongeka kwa magawo okwera a gawo lofewa kapena kutsekereza mabowo.