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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 2026-09-28.

220

High risk

4,993

Elevated

20,143

Watch

9,976

With an open solicitation now

By supply class

All classes ←
4820 Valves, Nonpowered 1286 · 13 high
5330 Packing And Gasket Materials 1036 · 12 high
5340 Hardware, Commercial 1209 · 7 high
1560 Airframe Structural Components 463 · 7 high
4730 Hose, Pipe, Tube, Lubrication, And Railing Fittings 845 · 6 high
5935 Connectors, Electrical 778 · 6 high
4710 Pipe, Tube And Rigid Tubing 271 · 5 high
6140 Batteries, Rechargeable 101 · 5 high
5306 Bolts 512 · 4 high
5365 Bushings, Rings, Shims, And Spacers 412 · 4 high
5995 Cable, Cord, And Wire Assemblies: Communication Equipment 307 · 4 high
5325 Fastening Devices 298 · 4 high
5360 Coil, Flat, Leaf, And Wire Springs 283 · 4 high
4810 Valves, Powered 279 · 4 high
5998 Electrical And Electronic Assemblies, Boards, Cards, And Associated Hardware 190 · 4 high
4930 Lubrication And Fuel Dispensing Equipment 50 · 4 high
8465 Individual Equipment 32 · 4 high
5305 Screws 893 · 3 high
1680 Miscellaneous Aircraft Accessories And Components 295 · 3 high
6130 Converters, Electrical, Nonrotating 127 · 3 high
4130 Refrigeration And Air Conditioning Components 121 · 3 high
5342 Hardware, Weapon System 115 · 3 high
5970 Electrical Insulators And Insulating Materials 111 · 3 high
5962 Microcircuits, Electronic 109 · 3 high
4310 Compressors And Vacuum Pumps 107 · 3 high
5310 Nuts And Washers 830 · 2 high
4720 Hose And Flexible Tubing 503 · 2 high
5930 Switches 461 · 2 high
3040 Miscellaneous Power Transmission Equipment 381 · 2 high
4320 Power And Hand Pumps 315 · 2 high

How the score is built

AAC V (terminal, no replacement) 40 · AAC Y 30 · AAC X 25 · single source whose SAM registration has expired 45 · every verifiable source expired 35 · one active source 15, and 10 more if its SAM renewal is due within 90 days · FLIS marks every source CAGE inactive 15 · solicited this year, last award 3+ years ago 15 (no award on record 10) · a restricted AMSC on the latest solicitation adds a quarter. High is 60 and up, Elevated 35, Watch 15.

Sources: FLIS reference and management data, SAM.gov entity registrations, DLA DIBBS solicitations and awards. Same list for every reader. Data, not advice.

26 stock numbers

NSN	Item	Risk	Why	Sources	Last award	Open
1615-01-201-9628	Retainer,Valve	Elevated 50	single approved source (registered in SAM); that source's SAM registration (77272) is due for renewal by Nov 12, 2026; solicited in the last 12 months; last award Jan 2014; AMSC C on the latest solicitation: only approved sources may supply	11 active · 0 expired · 0 unverified	Jan 2014$114.00	1
1615-00-121-6450	Lock,Nut,Main Rotor	Elevated 50	single approved source (registered in SAM); that source's SAM registration (97499) is due for renewal by Nov 14, 2026; solicited in the last 12 months; last award Jul 2019; AMSC P on the latest solicitation: only approved sources may supply	11 active · 0 expired · 0 unverified	Jul 2019$91.51	1
1615-00-979-8577	Adapter,Driveshaft,	Elevated 50	one active source in SAM out of 2 approved (1 expired, 0 unverified); that source's SAM registration (97499) is due for renewal by Nov 14, 2026; solicited in the last 12 months; last award Jun 2022; AMSC C on the latest solicitation: only approved sources may supply	21 active · 1 expired · 0 unverified	Jun 2022$8,449.00	1
1615-01-046-2290	Idler Assembly,Main	Elevated 50	single approved source (registered in SAM); that source's SAM registration (97499) is due for renewal by Nov 14, 2026; solicited in the last 12 months; last award Aug 2012; AMSC C on the latest solicitation: only approved sources may supply	11 active · 0 expired · 0 unverified	Aug 2012$10,898.72	1
1615-01-170-5232	Tip Cap,Blade	Elevated 50	one active source in SAM out of 3 approved (0 expired, 2 unverified); that source's SAM registration (8V613) is due for renewal by Nov 12, 2026; solicited in the last 12 months; last award May 2016; AMSC P on the latest solicitation: only approved sources may supply	31 active · 0 expired · 2 unverified	May 2016$44.20	1 in 12 m
1615-01-249-3825	Rest Assembly,Screw	Elevated 50	one active source in SAM out of 3 approved (0 expired, 2 unverified); that source's SAM registration (8V613) is due for renewal by Nov 12, 2026; solicited in the last 12 months; last award Dec 2011; AMSC P on the latest solicitation: only approved sources may supply	31 active · 0 expired · 2 unverified	Dec 2011$140.00	1 in 12 m
1615-01-447-6764	Yoke,Main Rotor Asse	Elevated 43	single approved source (registered in SAM); that source's SAM registration (97499) is due for renewal by Nov 14, 2026; solicited in the last 12 months; no award in our record; AMSC P on the latest solicitation: only approved sources may supply	11 active · 0 expired · 0 unverified	none on record	1 in 12 m
1615-01-472-3630	Spider,Lower,Main	Elevated 43	single approved source (registered in SAM); that source's SAM registration (97499) is due for renewal by Nov 14, 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
1615-01-113-0291	Duct Assy,Transmiss	Elevated 40	single approved source (registered in SAM); that source's SAM registration (77272) is due for renewal by Nov 12, 2026; solicited in the last 12 months; last award Jun 2021	11 active · 0 expired · 0 unverified	Jun 2021$10,286.56	1
1615-01-125-8816	Liner,Gearbox	Elevated 37	single approved source (registered in SAM); solicited in the last 12 months; last award Mar 2012; AMSC C on the latest solicitation: only approved sources may supply	11 active · 0 expired · 0 unverified	Mar 2012$322.29	1
1615-00-181-5552	Cap And Filler Assy	Elevated 37	single approved source (registered in SAM); solicited in the last 12 months; last award Jul 2010; AMSC D on the latest solicitation: only approved sources may supply	11 active · 0 expired · 0 unverified	Jul 2010$453.90	1 in 12 m
1615-00-946-2725	Sleeve Seal,Shaft R	Elevated 37	single approved source (registered in SAM); solicited in the last 12 months; last award Feb 2019; AMSC C on the latest solicitation: only approved sources may supply	11 active · 0 expired · 0 unverified	Feb 2019$2,574.35	1 in 12 m
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
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
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
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
1615-00-938-9824	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
1615-01-708-7630	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
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

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.