The Cap,protective,dust and Moisture, cataloged under National Stock Number 5340-01-297-6404, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 11 specifications, 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-297-6404 |
| Primary Part Number | 5497637-1 |
| Item Name | Cap,protective,dust and Moisture |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-P-24441/2 MIL SPEC SINGLE TREATMENT RESPONSE |
| Design Type | THREADED |
| Overall Diameter | 3.250 INCHES NOMINAL IN |
| Tube Outside Diameter for Which Designed | 1.500 INCHES NOMINAL IN |
| Material Document and Classification | AMS 5643 ASSN STD SINGLE MATERIAL RESPONSE |
| Surface Treatment | PAINT |
| Thread Class | 3B |
| Material | STEEL |
| Thread Size and Series/type Designator | 1.500-6 UNIFIED NATIONAL COARSE (UNC) |
| Inside Diameter Length | 1.312 INCHES NOMINAL IN |
| Round Cap Outside Surface Condition | SMOOTH |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Unit of Issue | EA |
| Part Number | Manufacturer |
|---|---|
| 5497637-1 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 5497637-2 | 5/9 Secondary reference Lockheed Martin Corp Lockheed Martin Laboratories M/p 24 |
| 5497637-2 | 5/9 Secondary reference Naval Sea Systems Command |
| 5497637-1 | 5/9 Secondary reference Lockheed Martin Corp Lockheed Martin Laboratories M/p 24 |
| 5497637-1 | 5/9 Secondary reference Lockheed Martin Corporation Div Rotary and Mission Systems |
| 5497637-2 | 5/9 Secondary reference Lockheed Martin Corporation Div Rotary and Mission Systems |
NSN 5340-01-297-6404 is a Cap,protective,dust and Moisture, manufactured by Naval Sea Systems Command, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-297-6404 has 1 manufacturer part number on file: 5497637-1 (Naval Sea Systems Command).
Key specifications for 5497637-1: Surface Treatment Document and Classification: MIL-P-24441/2 MIL SPEC SINGLE TREATMENT RESPONSE; Design Type: THREADED; Overall Diameter: 3.250 INCHES NOMINAL IN; Tube Outside Diameter for Which Designed: 1.500 INCHES NOMINAL IN. 11 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). 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.