NSN 7R-2840-016578391-F7, REF NR 340-161-304-0, QTY 13 SE, DELIVERY FOB ORIGIN. This part is a commercial/nondevelopmental/off-the-shelf item. Commercial item descriptions, commercial vendor catalog o... NSN 7R-2840-016578391-F7, REF NR 340-161-304-0, QTY 13 SE, DELIVERY FOB ORIGIN. This part is a commercial/nondevelopmental/off-the-shelf item. Commercial item descriptions, commercial vendor catalog or price lists or commercial manuals assigned a technical manual number apply. 100% Small Business Set Aside applies to this procurement.