The Locking,special Screw, cataloged under National Stock Number 2040-01-346-2547, 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 Sea Systems Command. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2040-01-346-2547 |
| Primary Part Number | 522 5489289 REV-ITEM 4 |
| Item Name | Locking,special Screw |
| FSC / FSG | 2040 / 20 — Marine Hardware and Hull Items |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| General Characteristics Item Description | NICKEL-COPPER ALLOY MATERIAL PER QQ-N-281 CL A HR |
| 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 |
|---|---|
| 522 5489289 REV-ITEM 4 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| H8830404 | 3/9 Design control — primary reference Naval Ship Engineering Center Philadelphia Division Submarine Antenna Quality Assurance |
| 5489289 ITEM 4 | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
NSN 2040-01-346-2547 is a Locking,special Screw, manufactured by Naval Sea Systems Command, classified under FSC 2040, Marine Hardware and Hull Items. Status: active.
NSN 2040-01-346-2547 has 1 manufacturer part number on file: 522 5489289 REV-ITEM 4 (Naval Sea Systems Command).
Key specifications for 522 5489289 REV-ITEM 4: General Characteristics Item Description: NICKEL-COPPER ALLOY MATERIAL PER QQ-N-281 CL A HR; End Item Identification: SSN 688 CLASS SUBMARINE NO. 1 PERISCOPE SYSTEM. 1 specification is 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.