Aviation Dictionary
میخ پرچ سرهلالی ،نوعی میخ پرج که سر آن دارای قوس باز و از نوع گرد آن پهن تر می باشد
A thin protruding-head rivet that was at one time popular for aircraft sheet metal construction. brazier-head rivets have been superseded and may be replaced by ms20470 (an 470) universal-head rivets.