The flat panel spars have imbedded nut elements that serve as {HEAD ~ “internal tooling}” to provide {TAIL ~ a positive stop} for locating and clamping the structural members together 
The flat panel spars have imbedded nut elements that serve as { HEAD ~ “ internal tooling } ” to provide { TAIL ~ a positive stop } for locating and clamping the structural members together
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH