The Cap,protective,dust and Moisture, cataloged under National Stock Number 5340-01-122-4631, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Lockheed Martin Corporation Div Rms. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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. Unit of issue: EA.
| Item Name | Cap,protective,dust and Moisture |
| FSC / FSG | 5340 — Hardware, Commercial (FSG 53) |
| Manufacturers | Lockheed Martin Corporation Div Rms (CAGE 03538); Diversified Machining, Inc. Dba Diversified Machining Inc (CAGE 5U695) |
| Parameter | Value |
|---|---|
| NSN | 5340-01-122-4631 |
| Primary Part Number | B-3393 |
| Item Name | Cap,protective,dust and Moisture |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Lockheed Martin Corporation Div Rms |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Unit of Issue | EA |
| Part Number | Manufacturer |
|---|---|
| B-3393 PRIMARY | Lockheed Martin Corporation Div Rms (USA) |
| B-3393 | Diversified Machining, Inc. Dba Diversified Machining Inc (USA) |
| Reference | Meaning |
|---|---|
| B3393 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| B-3393 | 5/9 Secondary reference Martin Marietta Technologies Inc Sub of Martin Marietta Corp Aero and Naval Systems |
NSN 5340-01-122-4631 is a Cap,protective,dust and Moisture, manufactured by Lockheed Martin Corporation Div Rms, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-122-4631 has 2 manufacturer part numbers on file: B-3393 (Lockheed Martin Corporation Div Rms), B-3393 (Diversified Machining, Inc. Dba Diversified Machining Inc).
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.