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Obsolescence watch: 4320 Power And Hand Pumps
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.
21 stock numbers at elevated risk, solicited now
| NSN | Item | Risk | Why | Sources | Last award | Open |
|---|---|---|---|---|---|---|
| 4320-01-086-2873 | Pump Unit,Centrifuga | Elevated 56 | single approved source, and its SAM registration has expired; AMSC C on the latest solicitation: only approved sources may supply | 10 active · 1 expired · 0 unverified | Sep 2025$1,795.97 | 1 |
| 4320-01-452-8353 | Pump,Hydraulic Ram,H | Elevated 56 | single approved source, and its SAM registration has expired; AMSC D on the latest solicitation: only approved sources may supply | 10 active · 1 expired · 0 unverified | Jun 2026$4,201.40 | 1 |
| 4320-01-464-2203 | Potentiometer,Cntr | Elevated 56 | single approved source, and its SAM registration has expired; AMSC C on the latest solicitation: only approved sources may supply | 10 active · 1 expired · 0 unverified | Aug 2026$9,851.42 | 1 |
| 4320-01-608-5676 | Connector,Fluid,Pump | Elevated 56 | single approved source, and its SAM registration has expired; AMSC D on the latest solicitation: only approved sources may supply | 10 active · 1 expired · 0 unverified | Aug 2026$2,603.00 | 1 |
| 4320-00-163-1075 | Pump,Rotary | Elevated 50 | single approved source (registered in SAM); that source's SAM registration (71871) is due for renewal by Oct 15, 2026; solicited in the last 12 months; last award Dec 2016; AMSC C on the latest solicitation: only approved sources may supply | 11 active · 0 expired · 0 unverified | Dec 2016$6,083.94 | 1 |
| 4320-01-588-5835 | Impeller,Pump,Centri | Elevated 50 | single approved source (registered in SAM); that source's SAM registration (10941) is due for renewal by Sep 23, 2026; solicited in the last 12 months; last award Jun 2023; AMSC D on the latest solicitation: only approved sources may supply | 11 active · 0 expired · 0 unverified | Jun 2023$7,924.00 | 1 |
| 4320-01-504-1635 | Impeller,Pump,Centri | Elevated 43 | single approved source (registered in SAM); that source's SAM registration (10941) is due for renewal by Sep 23, 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 |
| 4320-01-696-5522 | Pump,Centrifugal | Elevated 43 | single approved source (registered in SAM); that source's SAM registration (96046) is due for renewal by Nov 21, 2026; 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 |
| 4320-01-596-8056 | Sleeve,Shaft,Pump | Elevated 40 | single approved source (registered in SAM); that source's SAM registration (10941) is due for renewal by Sep 23, 2026; solicited in the last 12 months; last award May 2023 | 11 active · 0 expired · 0 unverified | May 2023$656.00 | 1 |
| 4320-01-580-7709 | Diffusor | Elevated 37 | one active source in SAM out of 2 approved (0 expired, 1 unverified); solicited in the last 12 months; last award Jan 2019; AMSC C on the latest solicitation: only approved sources may supply | 21 active · 0 expired · 1 unverified | Jan 2019$57,485.00 | 2 |
| 4320-00-363-5623 | Impeller,Pump,Centri | Elevated 37 | one active source in SAM out of 3 approved (0 expired, 2 unverified); solicited in the last 12 months; last award Jun 2022; AMSC C on the latest solicitation: only approved sources may supply | 31 active · 0 expired · 2 unverified | Jun 2022$65,995.64 | 1 |
| 4320-00-470-7253 | Pump,Rotary | Elevated 37 | one active source in SAM out of 2 approved (0 expired, 1 unverified); solicited in the last 12 months; last award Sep 2008; AMSC H on the latest solicitation: only approved sources may supply | 21 active · 0 expired · 1 unverified | Sep 2008$5,030.00 | 1 |
| 4320-00-575-9876 | Pump,Centrifugal | Elevated 37 | one active source in SAM out of 6 approved (0 expired, 5 unverified); solicited in the last 12 months; last award Oct 1996; AMSC C on the latest solicitation: only approved sources may supply | 61 active · 0 expired · 5 unverified | Oct 1996$3,033.39 | 1 |
| 4320-00-790-9742 | Tube,Bypass | Elevated 37 | one active source in SAM out of 3 approved (0 expired, 2 unverified); solicited in the last 12 months; last award Aug 2017; AMSC P on the latest solicitation: only approved sources may supply | 31 active · 0 expired · 2 unverified | Aug 2017$205.00 | 1 |
| 4320-01-139-1621 | Block,Cylinder | Elevated 37 | single approved source (registered in SAM); solicited in the last 12 months; last award Mar 2002; AMSC L on the latest solicitation: only approved sources may supply | 11 active · 0 expired · 0 unverified | Mar 2002$2,697.65 | 1 |
| 4320-01-173-9694 | Stop Lock,Pump | Elevated 37 | one active source in SAM out of 4 approved (0 expired, 3 unverified); solicited in the last 12 months; last award Mar 2023; AMSC D on the latest solicitation: only approved sources may supply | 41 active · 0 expired · 3 unverified | Mar 2023$141.00 | 1 |
| 4320-01-182-9818 | Filter | Elevated 37 | single approved source (registered in SAM); solicited in the last 12 months; last award Jan 2014; AMSC L on the latest solicitation: only approved sources may supply | 11 active · 0 expired · 0 unverified | Jan 2014$394.40 | 1 |
| 4320-01-182-9822 | Retainer,Hold Down | Elevated 37 | single approved source (registered in SAM); solicited in the last 12 months; last award Oct 2019; AMSC D on the latest solicitation: only approved sources may supply | 11 active · 0 expired · 0 unverified | Oct 2019$275.00 | 1 |
| 4320-01-199-2251 | Seal Assembly,Shaft, | Elevated 37 | one active source in SAM out of 2 approved (0 expired, 1 unverified); solicited in the last 12 months; last award Dec 2022; AMSC D on the latest solicitation: only approved sources may supply | 21 active · 0 expired · 1 unverified | Dec 2022$2,175.66 | 1 |
| 4320-01-262-9373 | Pump Unit,Rotary | Elevated 37 | single approved source (registered in SAM); solicited in the last 12 months; last award Mar 2017; AMSC L on the latest solicitation: only approved sources may supply | 11 active · 0 expired · 0 unverified | Mar 2017$89,765.00 | 1 |
| 4320-01-497-1929 | Seal Assembly,Shaft, | Elevated 37 | one active source in SAM out of 2 approved (0 expired, 1 unverified); solicited in the last 12 months; last award Jun 2023; AMSC D on the latest solicitation: only approved sources may supply | 21 active · 0 expired · 1 unverified | Jun 2023$4,864.18 | 1 |
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.