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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.
15 stock numbers at watch risk
| NSN | Item | Risk | Why | Sources | Last award | Open |
|---|---|---|---|---|---|---|
| 1615-00-254-2191 | Retainer,Tail Rotor | Watch 31 | single approved source (registered in SAM); that source's SAM registration (97499) is due for renewal by Nov 14, 2026; AMSC C on the latest solicitation: only approved sources may supply | 11 active · 0 expired · 0 unverified | Aug 2025$910.50 | 1 |
| 1615-01-202-7130 | Housing Assembly,End | Watch 31 | one active source in SAM out of 2 approved (0 expired, 1 unverified); that source's SAM registration (81039) is due for renewal by Oct 6, 2026; AMSC D on the latest solicitation: only approved sources may supply | 21 active · 0 expired · 1 unverified | Nov 2024$2,230.40 | 1 |
| 1615-01-202-7131 | Rotor Assembly,Actua | Watch 31 | one active source in SAM out of 2 approved (0 expired, 1 unverified); that source's SAM registration (81039) is due for renewal by Oct 6, 2026; AMSC C on the latest solicitation: only approved sources may supply | 21 active · 0 expired · 1 unverified | Dec 2024$3,588.50 | 1 in 12 m |
| 1615-01-247-8481 | Lubricator,Transmis | Watch 31 | one active source in SAM out of 2 approved (0 expired, 1 unverified); that source's SAM registration (77272) is due for renewal by Nov 12, 2026; AMSC P on the latest solicitation: only approved sources may supply | 21 active · 0 expired · 1 unverified | May 2025$1,460.00 | 1 in 12 m |
| 1615-01-666-5302 | Detector,Metallic Pa | 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 |
| 1615-01-670-2638 | Swashplate,Controlla | 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 |
| 1615-01-681-8758 | Boot,Air | Watch 31 | single approved source (registered in SAM); that source's SAM registration (3HRL4) is due for renewal by Sep 3, 2026; AMSC C on the latest solicitation: only approved sources may supply | 11 active · 0 expired · 0 unverified | Sep 2024$1,564.00 | 1 in 12 m |
| 1615-01-708-6054 | Detector,Metallic Pa | 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 |
| 1615-00-938-9824 | Plug,Lubrication Jet | Watch 30 | single approved source (registered in SAM); solicited in the last 12 months; last award Apr 2013 | 11 active · 0 expired · 0 unverified | Apr 2013$16.08 | 1 in 12 m |
| 1615-01-408-2378 | Lead Stop,Rotary Win | 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$97.18 | 1 in 12 m |
| 1615-01-541-1000 | Mast Pole,Aircraft, | Watch 25 | single approved source (registered in SAM); that source's SAM registration (97499) is due for renewal by Nov 14, 2026 | 11 active · 0 expired · 0 unverified | none on record | — |
| 1615-01-005-4644 | Ch1p,Detector,Elect | 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 | Nov 2023$1,651.08 | 1 |
| 1615-01-307-2125 | Breather | 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 | Aug 2026$3,304.64 | 1 |
| 1615-01-116-7089 | Indicator,Bypass | 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 | Mar 2024$308.00 | 1 in 12 m |
| 1615-01-708-7630 | Detector,Metallic Pa | Watch 18 | single approved source (registered in SAM); AMSC D on the latest solicitation: only approved sources may supply | 11 active · 0 expired · 0 unverified | Nov 2025$3,919.72 | 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.