[TowerTalk] Hardline connector selection

[Drax Felton]

If I have 7/8 hardline of an unknown type (likely Andrews since the guy i got it from had tons of andrews parts) how do I determine which end connectors to use?   

For example what is the difference between these two from Nebraska Surplus Sales?

(CRF) L5NM
" N" male fits 7/8" Heliax LDF5-50A or Cablewave FLC78-50. Andrew, new in the box.

(CRF) FLC-78-50 
Type "N" male for concentric "ribbed" 7/8" Cablewave FLC78-50 hardline or Andrew LDF5-50A Heliax. Same function as L5NM.

kb3x