The Upper Lobe Assy, cataloged under National Stock Number 2040-01-446-2922, is classified within Federal Supply Class 2040 (Marine Hardware and Hull Items) of the Ship and Marine Equipment group. The manufacturer of record is Aef-Performance Llc. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 2040-01-446-2922 |
| Primary Part Number | 5749403-056 |
| Item Name | Upper Lobe Assy |
| FSC / FSG | 2040 / 20 — Marine Hardware and Hull Items |
| Manufacturer | Aef-Performance Llc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 5749403-056 PRIMARY | Aef-Performance Llc (USA) |
| 5749403-056 | Smr Acquisition Llc (USA) |
| Reference | Meaning |
|---|---|
| 119-5749403 | D/9 Drawing number reference only Naval Sea Systems Command |
| 5749403-056 | 3/1 Design control — primary reference Naval Sea Systems Command |
NSN 2040-01-446-2922 is a Upper Lobe Assy, manufactured by Aef-Performance Llc, classified under FSC 2040, Marine Hardware and Hull Items. Status: active.
NSN 2040-01-446-2922 has 2 manufacturer part numbers on file: 5749403-056 (Aef-Performance Llc), 5749403-056 (Smr Acquisition Llc).
1 possible match (shared part number, not a government interchangeability claim): 2040-01-446-2927. Verify interchangeability with system specifications before substitution.
Key specifications for 5749403-056: Special Features: IS A SEGMENT OF THE LONGITUDINAL STABILITY SEAL; SUBASSEMBLY OF A SKIRT FOR A HOVERCRAFT; End Item Identification: 2040-01-307-5108. 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 2040-01-446-2922 has DEMIL Code Q. 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.