The Cap,protective,dust and Moisture, cataloged under National Stock Number 5340-01-331-7976, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems. Government technical data includes 8 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5340-01-331-7976 |
| Primary Part Number | 03A366-4 |
| Item Name | Cap,protective,dust and Moisture |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-C-5541, CLASS 1A MIL SPEC SINGLE TREATMENT RESPONSE A |
| Design Type | FRICTION |
| Overall Diameter | 0.614 INCHES NOMINAL IN |
| Material Document and Classification | QQ-A-250/1, 0 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-A-250/2, ALLOY 3003, 0 FED SPEC SINGLE MATERIAL RESPONSE |
| Opening Inside Diameter for Which Designed | 0.514 INCHES MINIMUM AND 0.534 INCHES MAXIMUM IN |
| Surface Treatment | CHROMATE |
| Material | ALUMINUM ALLOY OR ALUMINUM ALLOY 3003 |
| Inside Diameter Length | 0.400 INCHES MINIMUM AND 0.420 INCHES MAXIMUM IN |
| 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 |
|---|---|
| 03A366-4 PRIMARY | Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems (USA) |
| Reference | Meaning |
|---|---|
| 03A366-4 | 5/9 Secondary reference Asi Aerospace Group, Inc. Dba Barco Aviation |
| 03A366-4 | C/1 Advisory reference — outside the item-of-supply concept Align Aerospace Llc |
| 03A366-4 | 5/9 Secondary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems |
NSN 5340-01-331-7976 is a Cap,protective,dust and Moisture, manufactured by Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-331-7976 has 1 manufacturer part number on file: 03A366-4 (Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems).
Key specifications for 03A366-4: Surface Treatment Document and Classification: MIL-C-5541, CLASS 1A MIL SPEC SINGLE TREATMENT RESPONSE A; Design Type: FRICTION; Overall Diameter: 0.614 INCHES NOMINAL IN; Material Document and Classification: QQ-A-250/1, 0 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-A-250/2, ALLOY 3003, 0 FED SPEC SINGLE MATERIAL RESPONSE. 8 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.