Since the pin is symmetrical, its orientation relative to the circuit board is unimportant, which facilitates automatic insertion of {HEAD ~ the pin} into {TAIL ~ the board} 
Since the pin is symmetrical , its orientation relative to the circuit board is unimportant , which facilitates automatic insertion of { HEAD ~ the pin } into { TAIL ~ the board }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL