The Material,radar Absorbent, cataloged under National Stock Number 2040-01-421-3254, is classified within Federal Supply Class 2040 (Marine Hardware and Hull Items) of the Ship and Marine Equipment group. The manufacturer of record is Naval Inventory Control Point Mechanicsburg. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2040-01-421-3254 |
| Primary Part Number | 472-4491223-20SQ |
| Item Name | Material,radar Absorbent |
| FSC / FSG | 2040 / 20 — Marine Hardware and Hull Items |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Criticality Code Justification | ZZZY |
| Reference Number Differentiating Characteristics | QUALITY ASSURANCE TESTED FOR SUBMARINE ANTENNA APPLICATION |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL P — Demil Prior To Sale/Transfer |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| 472-4491223-20SQ | Naval Inventory Control Point Mechanicsburg (USA) |
| 4491223-20SQ | Naval Inventory Control Point Mechanicsburg (USA) |
| 4491223 ITEM 20SQ | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 4491223 ITEM 20 | 5/1 Secondary reference Laird R & F Products, Inc. |
| 4491223 ITEM 20 | 5/1 Secondary reference Arc Technologies Llc |
| 472-4491223-20 | 3/9 Design control — primary reference Naval Ship Engineering Center Philadelphia Division Submarine Antenna Quality Assurance |
| 4491223-20 | 5/9 Secondary reference Naval Ship Engineering Center Philadelphia Division Submarine Antenna Quality Assurance |
| 4491223 ITEM 20 | 5/1 Secondary reference Naval Undersea Warfare Ctr |
NSN 2040-01-421-3254 is a Material,radar Absorbent, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 2040, Marine Hardware and Hull Items. Status: active.
NSN 2040-01-421-3254 has 3 manufacturer part numbers on file: 472-4491223-20SQ (Naval Inventory Control Point Mechanicsburg), 4491223-20SQ (Naval Inventory Control Point Mechanicsburg), 4491223 ITEM 20SQ (Naval Inventory Control Point Mechanicsburg).
1 possible match (shared part number, not a government interchangeability claim): 2040-01-668-2076. Verify interchangeability with system specifications before substitution.
Key specifications for 472-4491223-20SQ: Criticality Code Justification: ZZZY; End Item Identification: CAMOUFLAGE UNIT,RADAR; Reference Number Differentiating Characteristics: QUALITY ASSURANCE TESTED FOR SUBMARINE ANTENNA APPLICATION. 2 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 2040-01-421-3254 has DEMIL Code P. Demilitarization may be required before disposal or transfer to non-military entities.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.