The Retainer Plate,forward and Aft, cataloged under National Stock Number 2040-01-348-2218, 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2040-01-348-2218 |
| Primary Part Number | 400 5489358 REV-ITEM 9 |
| Item Name | Retainer Plate,forward and Aft |
| FSC / FSG | 2040 / 20 — Marine Hardware and Hull Items |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| General Characteristics Item Description | MATERIAL NICKEL-COPPER PER QQ-N-281,CL A,HF; 6.500 IN. L; 2.250 IN. H IN |
| 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 |
|---|---|
| 400 5489358 REV-ITEM 9 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6640217-9 | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
| 5489358-9 | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
| B9930209 | 3/9 Design control — primary reference Naval Ship Engineering Center Philadelphia Division Submarine Antenna Quality Assurance |
NSN 2040-01-348-2218 is a Retainer Plate,forward and Aft, manufactured by Naval Sea Systems Command, classified under FSC 2040, Marine Hardware and Hull Items. Status: active.
NSN 2040-01-348-2218 has 1 manufacturer part number on file: 400 5489358 REV-ITEM 9 (Naval Sea Systems Command).
Key specifications for 400 5489358 REV-ITEM 9: General Characteristics Item Description: MATERIAL NICKEL-COPPER PER QQ-N-281,CL A,HF; 6.500 IN. L; 2.250 IN. H IN; Special Features: 250 MICROINCH FINISH OVERALL; 4 HOLES 0.560 IN. DIA IN; End Item Identification: SSN 688 CLASS SYBMARINE 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.