FIGS 4 and 5 are sectional views of the stem 8 showing groove 41 for engaging {TAIL ~ a spring clip} and {HEAD ~ slanted surface} 42 
FIGS 4 and 5 are sectional views of the stem 8 showing groove 41 for engaging { TAIL ~ a spring clip } and { HEAD ~ slanted surface } 42
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH