... -AABoth ends adaptors per MIL-27487 specications.LF-QC-AAN same as style AA,except that between the two adaptors there ... -DDBoth ends couplers per MIL-27487 specications.LF-QC-DDN same as style DD,except that between he two couplers there ... end coupler and the other end adaptor.LF-QC-DAN same as style DA,except that between the adaptor and the ...