The Flap,anti-Backflow, cataloged under National Stock Number 2040-01-476-4703, 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. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2040-01-476-4703 |
| Primary Part Number | 7401483-001 |
| Item Name | Flap,anti-Backflow |
| FSC / FSG | 2040 / 20 — Marine Hardware and Hull Items |
| Manufacturer | Aef-Performance Llc |
| Status | ACTIVE |
| General Characteristics Item Description | FLAP HAS THREE MOUNTING HOLES, AND IS MOUNTED TO ALLOWFLOW TO GO ONE WAY |
| Material | RUBBER SYNTHETIC |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 7401483-001 | Smr Acquisition Llc (USA) |
| 7401483-001 PRIMARY | Aef-Performance Llc (USA) |
| Reference | Meaning |
|---|---|
| 7401483 | D/9 Drawing number reference only Naval Sea Systems Command |
| 9704830010 | 5/9 Secondary reference Aef-Performance Llc |
| 7401483-001 | 5/1 Secondary reference Naval Sea Systems Command |
NSN 2040-01-476-4703 is a Flap,anti-Backflow, manufactured by Aef-Performance Llc, classified under FSC 2040, Marine Hardware and Hull Items. Status: active.
NSN 2040-01-476-4703 has 2 manufacturer part numbers on file: 7401483-001 (Smr Acquisition Llc), 7401483-001 (Aef-Performance Llc).
Key specifications for 7401483-001: General Characteristics Item Description: FLAP HAS THREE MOUNTING HOLES, AND IS MOUNTED TO ALLOWFLOW TO GO ONE WAY; Special Features: IS PART OF LCAC DEEP SKIRT ANTI-BACKFLOW VALVE SEGS. 1 & 2, FOR THE ANTI-BOUNCE WEB ASSEMBLY; End Item Identification: LCAC; Material: RUBBER SYNTHETIC. 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.
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.