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Obsolescence watch
Stock numbers the government still buys whose supply base is thinning. Each one carries the reasons in plain words: the government's own terminal codes, approved sources whose SAM registration has expired, a single source, a registration about to lapse, years of solicitations without an award. A source we cannot verify in SAM is shown as unverified, never counted as gone. Rebuilt nightly; this list is from 2026-09-29.
47 stock numbers
| NSN | Item | Risk | Why | Sources | Last award | Open |
|---|---|---|---|---|---|---|
| 2840-00-116-5949 | Support,Turbine Nozz | High 68 | AAC V: the government marks it a terminal item with no replacement; solicited in the last 12 months; last award Oct 2019; AMSC C on the latest solicitation: only approved sources may supply | 64 active · 0 expired · 2 unverified | Oct 2019$6,977.00 | 1 in 12 m |
| 2840-00-137-3682 | Clamp,Hub Tie | High 68 | AAC V: the government marks it a terminal item with no replacement; solicited in the last 12 months; last award Oct 1998; AMSC C on the latest solicitation: only approved sources may supply | 32 active · 0 expired · 1 unverified | Oct 1998$103.20 | 1 in 12 m |
| 2840-01-545-3317 | Sensotec Pressure T | Elevated 56 | single approved source, and its SAM registration has expired; AMSC P on the latest solicitation: only approved sources may supply | 10 active · 1 expired · 0 unverified | Jul 2026$2,404.03 | 1 |
| 2840-00-116-7922 | Cover,Nozzle | Elevated 55 | AAC V: the government marks it a terminal item with no replacement; single approved source (registered in SAM) | 11 active · 0 expired · 0 unverified | Sep 2026$234.80 | 1 in 12 m |
| 2840-01-666-6895 | Bracket,Exciter | Elevated 43 | single approved source (registered in SAM); that source's SAM registration (54787) is due for renewal by Oct 30, 2026; solicited in the last 12 months; no award in our record; AMSC C on the latest solicitation: only approved sources may supply | 11 active · 0 expired · 0 unverified | none on record | 1 in 12 m |
| 2840-01-511-7387 | Insulation Blanket,Thermal,Aircr | Elevated 40 | AAC V: the government marks it a terminal item with no replacement | 33 active · 0 expired · 0 unverified | none on record | — |
| 2840-01-398-3813 | Blade,Turbine Rotor, | Elevated 37 | one active source in SAM out of 2 approved (0 expired, 1 unverified); solicited in the last 12 months; last award Sep 2016; AMSC C on the latest solicitation: only approved sources may supply | 21 active · 0 expired · 1 unverified | Sep 2016$413.43 | 1 |
| 2840-01-651-0735 | Link,Mount | Elevated 37 | single approved source (registered in SAM); solicited in the last 12 months; last award Jun 2019; AMSC C on the latest solicitation: only approved sources may supply | 11 active · 0 expired · 0 unverified | Jun 2019$1,439.71 | 1 |
| 2840-01-193-4386 | Blade Set,Turbine,Ai | Elevated 37 | one active source in SAM out of 2 approved (1 expired, 0 unverified); solicited in the last 12 months; last award Feb 2017; AMSC D on the latest solicitation: only approved sources may supply | 21 active · 1 expired · 0 unverified | Feb 2017$545.53 | 2 in 12 m |
| 2840-00-124-3017 | Elbow-Bearing,Oil | Elevated 37 | single approved source (registered in SAM); solicited in the last 12 months; last award Aug 2008; AMSC C on the latest solicitation: only approved sources may supply | 11 active · 0 expired · 0 unverified | Aug 2008$167.82 | 1 in 12 m |
| 2840-01-014-1882 | Shaft Assembly,Fuel | Elevated 37 | one active source in SAM out of 2 approved (0 expired, 1 unverified); solicited in the last 12 months; last award May 2019; AMSC C on the latest solicitation: only approved sources may supply | 21 active · 0 expired · 1 unverified | May 2019$1,113.58 | 1 in 12 m |
| 2840-01-274-9314 | Guide,Divergent Sea | Elevated 37 | one active source in SAM out of 2 approved (0 expired, 1 unverified); solicited in the last 12 months; last award May 1997; AMSC C on the latest solicitation: only approved sources may supply | 21 active · 0 expired · 1 unverified | May 1997$23.50 | 1 in 12 m |
| 2840-01-487-5388 | Ring,Turbine Stator | Elevated 37 | single approved source (registered in SAM); solicited in the last 12 months; last award Feb 2015; AMSC C on the latest solicitation: only approved sources may supply | 11 active · 0 expired · 0 unverified | Feb 2015$561.80 | 1 in 12 m |
| 2840-01-651-2647 | Fairing,Frame,Aircr | Watch 31 | single approved source (registered in SAM); solicited in the last 12 months; no award in our record; AMSC D on the latest solicitation: only approved sources may supply | 11 active · 0 expired · 0 unverified | none on record | 1 |
| 2840-01-664-9937 | Shield,Heat,Aircraft | Watch 31 | single approved source (registered in SAM); solicited in the last 12 months; no award in our record; AMSC D on the latest solicitation: only approved sources may supply | 11 active · 0 expired · 0 unverified | none on record | 1 |
| 2840-01-718-5001 | Shaft,Turbine,Aircr | Watch 31 | single approved source (registered in SAM); solicited in the last 12 months; no award in our record; AMSC D on the latest solicitation: only approved sources may supply | 11 active · 0 expired · 0 unverified | none on record | 1 |
| 2840-01-691-7442 | Shroud Segment,Turbi | Watch 31 | single approved source (registered in SAM); solicited in the last 12 months; no award in our record; AMSC C on the latest solicitation: only approved sources may supply | 11 active · 0 expired · 0 unverified | none on record | 2 in 12 m |
| 2840-00-948-8245 | Bracket,Ejector Noz | Watch 31 | single approved source (registered in SAM); solicited in the last 12 months; no award in our record; AMSC D on the latest solicitation: only approved sources may supply | 11 active · 0 expired · 0 unverified | none on record | 1 in 12 m |
| 2840-01-685-7471 | Seal,Air,Aircraft Ga | Watch 31 | single approved source (registered in SAM); solicited in the last 12 months; no award in our record; AMSC D on the latest solicitation: only approved sources may supply | 11 active · 0 expired · 0 unverified | none on record | 1 in 12 m |
| 2840-01-687-6458 | Seal,Metallic,Aircr | Watch 31 | single approved source (registered in SAM); solicited in the last 12 months; no award in our record; AMSC R on the latest solicitation: only approved sources may supply | 11 active · 0 expired · 0 unverified | none on record | 1 in 12 m |
| 2840-01-734-0890 | Damper,Turbine Blad | Watch 31 | single approved source (registered in SAM); solicited in the last 12 months; no award in our record; AMSC C on the latest solicitation: only approved sources may supply | 11 active · 0 expired · 0 unverified | none on record | 1 in 12 m |
| 2840-00-116-5951 | Strip,Nozzle Sealin | Watch 30 | one active source in SAM out of 2 approved (0 expired, 1 unverified); solicited in the last 12 months; last award Oct 1995 | 21 active · 0 expired · 1 unverified | Oct 1995$2.34 | 1 |
| 2840-01-517-5854 | Fairing,Turbine,Airc | Watch 30 | single approved source (registered in SAM); solicited in the last 12 months; last award Oct 2017 | 11 active · 0 expired · 0 unverified | Oct 2017$1,076.51 | 1 in 12 m |
| 2840-20-002-1142 | Power Turbine Stato | Watch 25 | no approved source on file in FLIS; solicited in the last 12 months; no award in our record; AMSC P on the latest solicitation: only approved sources may supply | 00 active · 0 expired · 0 unverified | none on record | 1 in 12 m |
| 2840-01-666-6889 | Tube,Sump | Watch 22 | single approved source, SAM status unverified; solicited in the last 12 months; no award in our record; AMSC C on the latest solicitation: only approved sources may supply | 10 active · 0 expired · 1 unverified | none on record | 1 in 12 m |
| 2840-00-907-2549 | Cap,Air Seal | Watch 18 | solicited in the last 12 months; last award May 1991; AMSC C on the latest solicitation: only approved sources may supply | 22 active · 0 expired · 0 unverified | May 1991$7.49 | 1 |
| 2840-01-170-1171 | Compressor Stator As | Watch 18 | solicited in the last 12 months; last award Dec 2009; AMSC P on the latest solicitation: only approved sources may supply | 22 active · 0 expired · 0 unverified | Dec 2009$3,242.84 | 1 |
| 2840-01-260-9193 | Clevis Assembly,Flap | Watch 18 | solicited in the last 12 months; last award Jul 2023; AMSC C on the latest solicitation: only approved sources may supply | 107 active · 0 expired · 3 unverified | Jul 2023$222.09 | 1 |
| 2840-01-389-2506 | Vane,Compressor,Airc | Watch 18 | one active source in SAM out of 2 approved (0 expired, 1 unverified); AMSC C on the latest solicitation: only approved sources may supply | 21 active · 0 expired · 1 unverified | Sep 2025$420.17 | 1 |
| 2840-01-455-3677 | Duct,Exhaust,Aircraf | Watch 18 | solicited in the last 12 months; last award Oct 2019; AMSC C on the latest solicitation: only approved sources may supply | 22 active · 0 expired · 0 unverified | Oct 2019$12,047.56 | 1 |
| 2840-01-465-7589 | Seal Ring,Labyrinth, | Watch 18 | single approved source (registered in SAM); AMSC R on the latest solicitation: only approved sources may supply | 11 active · 0 expired · 0 unverified | Dec 2025$846.15 | 1 |
| 2840-01-598-6833 | Vane,Compressor,Airc | Watch 18 | single approved source (registered in SAM); AMSC C on the latest solicitation: only approved sources may supply | 11 active · 0 expired · 0 unverified | May 2026$326.53 | 1 |
| 2840-00-069-7573 | Spacer,Compressor S | Watch 18 | solicited in the last 12 months; last award Jun 2021; AMSC P on the latest solicitation: only approved sources may supply | 32 active · 0 expired · 1 unverified | Jun 2021$472.00 | 1 in 12 m |
| 2840-00-176-3789 | Blade Set,Compresso | Watch 18 | solicited in the last 12 months; last award Mar 2014; AMSC R on the latest solicitation: only approved sources may supply | 43 active · 0 expired · 1 unverified | Mar 2014$139.00 | 1 in 12 m |
| 2840-00-190-3358 | Shield,Heat,Aircraft | Watch 18 | solicited in the last 12 months; last award Oct 2019; AMSC C on the latest solicitation: only approved sources may supply | 32 active · 0 expired · 1 unverified | Oct 2019$419.48 | 1 in 12 m |
| 2840-00-340-7417 | Shield,Heat,Aircraft | Watch 18 | solicited in the last 12 months; last award May 2023; AMSC C on the latest solicitation: only approved sources may supply | 54 active · 0 expired · 1 unverified | May 2023$11,376.86 | 1 in 12 m |
| 2840-00-861-0941 | Cover Assembly,Anti- | Watch 18 | solicited in the last 12 months; last award Jan 2023; AMSC R on the latest solicitation: only approved sources may supply | 43 active · 0 expired · 1 unverified | Jan 2023$602.80 | 1 in 12 m |
| 2840-01-450-8710 | Seal,Metallic,Aircra | Watch 18 | solicited in the last 12 months; last award Jun 2023; AMSC B on the latest solicitation: only approved sources may supply | 22 active · 0 expired · 0 unverified | Jun 2023$1,963.46 | 1 in 12 m |
| 2840-01-475-0706 | Tailpipe,Aircraft G | Watch 18 | one active source in SAM out of 2 approved (0 expired, 1 unverified); AMSC D on the latest solicitation: only approved sources may supply | 21 active · 0 expired · 1 unverified | Jul 2026$4,826.03 | 1 in 12 m |
| 2840-01-486-9346 | Cover Assembly,Airc | Watch 18 | single approved source (registered in SAM); AMSC P on the latest solicitation: only approved sources may supply | 11 active · 0 expired · 0 unverified | Dec 2025$1,388.98 | 1 in 12 m |
| 2840-01-554-9500 | Support,Turbine Comp | Watch 18 | single approved source (registered in SAM); AMSC C on the latest solicitation: only approved sources may supply | 11 active · 0 expired · 0 unverified | Nov 2023$3,031.92 | 1 in 12 m |
| 2840-01-685-8939 | Stiffener,Heatshield | Watch 18 | single approved source (registered in SAM); AMSC C on the latest solicitation: only approved sources may supply | 11 active · 0 expired · 0 unverified | Aug 2026$13,099.32 | 1 in 12 m |
| 2840-01-481-6665 | Shroud Segment,Turbi | Watch 15 | single approved source (registered in SAM) | 11 active · 0 expired · 0 unverified | Sep 2026$1,688.00 | 1 |
| 2840-01-443-4276 | Seal,Metallic,Aircra | Watch 15 | single approved source (registered in SAM) | 11 active · 0 expired · 0 unverified | Feb 2026$7,174.46 | 1 |
| 2840-01-475-9247 | Insert,Compressor R | Watch 15 | solicited in the last 12 months; last award Apr 2010 | 22 active · 0 expired · 0 unverified | Apr 2010$25.91 | 1 in 12 m |
| 2840-01-521-2570 | Kit,Fuel Filter | Watch 15 | single approved source (registered in SAM) | 11 active · 0 expired · 0 unverified | Jun 2025$2,689.00 | 1 in 12 m |
| 2840-01-617-8389 | Segment,Fan Liner | Watch 15 | single approved source (registered in SAM) | 11 active · 0 expired · 0 unverified | Sep 2026$37,320.00 | 1 in 12 m |
Have one of these on the shelf, or can you make it? List it free and the solicitation lands on your dashboard the morning it posts. Buyers: every NSN page shows the same read with the full source list.