Hexagon kusoshi ne hexagon head bolts (partial thread) - digiri C da hexagon head kusoshi (cikakken zaren) - grade C, kuma aka sani da hexagon head bolts (m) gashi hexagon head kusoshi, baƙin ƙarfe sukurori.Ana iya samun ma'aunin da aka saba amfani da su a: Din931, Din933 GB5782, GB5783, ISO4014, ISO4017, da dai sauransu.