The Buoyancy Module, cataloged under National Stock Number 2040-01-576-7684, is classified within Federal Supply Class 2040 (Marine Hardware and Hull Items) of the Ship and Marine Equipment group. The manufacturer of record is Hii Unmanned Systems, Inc. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 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 | 2040-01-576-7684 |
| Primary Part Number | 153520 |
| Item Name | Buoyancy Module |
| FSC / FSG | 2040 / 20 — Marine Hardware and Hull Items |
| Manufacturer | Hii Unmanned Systems, Inc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 153520 PRIMARY | Hii Unmanned Systems, Inc (USA) |
NSN 2040-01-576-7684 is a Buoyancy Module, manufactured by Hii Unmanned Systems, Inc, classified under FSC 2040, Marine Hardware and Hull Items. Status: active.
NSN 2040-01-576-7684 has 1 manufacturer part number on file: 153520 (Hii Unmanned Systems, Inc).
1 possible match (shared part number, not a government interchangeability claim): 7010-01-731-6536. Verify interchangeability with system specifications before substitution.
Key specifications for 153520: Special Features: 6 INCH OUTSIDE DIAMETER; LOWER; FLOATS THE CRADLE WHILE IN THE OCEAN EITHER DEPLOYING OR RECOVERING THE AUTONOMOUS UNDERWATER VEHICLE IN; End Item Identification: RECCE AUTONOMOUS UNDERWATER VEHICLE. 0 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 2040-01-576-7684 has DEMIL Code B. 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.