Mhete yakatsemuka pane imwe nguva uye yakakotama kuita helical chimiro.Izvi zvinoita kuti washer ishandise simba remuchirimo pakati pemusoro wechisungiso nechikamu, izvo zvinochengetedza washer zvakasimba zvichitarisana nesubstrate uye shinda yebhaudhi yakasimba ichipikisa nati kana shinda yesubstrate, zvichiita kuti pave nekukweshana uye kuramba kutenderera.Mitemo inoshandiswa ndeiyi ASME B18.21.1, DIN 127 B, neUnited States Military Standard NASM 35338 (yaimbova MS 35338 uye AN-935).