It comprises: a fastener body extending from {TAIL ~ a head portion} to a forward end in the preselected direction, the head portion defining {HEAD ~ an axially facing ring gear} for engagement with the drive gear 
It comprises : a fastener body extending from { TAIL ~ a head portion } to a forward end in the preselected direction , the head portion defining { HEAD ~ an axially facing ring gear } for engagement with the drive gear
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH