Aviation Dictionary
پیچ توخالی که از داخل دنده دارشده باشد ، مهره ای که به شکل پیچ باشد.
A barrel nut (also known as steel cross dowel or dowel nut) is a specialized nut, and is commonly used in aerospace and ready-to-assemble furniture applications. it is used to bolt thin sheet metal parts to larger, often billet or forged, parts.