The Cap,protective,dust and Moisture, cataloged under National Stock Number 5340-01-036-9744, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Lockheed Martin Corp Electronics and Missiles Div. Government technical data includes 7 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. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-036-9744 |
| Primary Part Number | 126839 |
| Item Name | Cap,protective,dust and Moisture |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Lockheed Martin Corp Electronics and Missiles Div |
| Status | ACTIVE |
| Width Across Flats | 0.080 INCHES NOMINAL IN |
| Design Type | FRICTION |
| Overall Diameter | 5.160 INCHES NOMINAL IN |
| Opening Inside Diameter for Which Designed | 5.000 INCHES NOMINAL IN |
| Material | PLASTIC, POLYETHYLENE (PP) |
| Inside Diameter Length | 2.410 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 |
|---|---|
| 126839 PRIMARY | Lockheed Martin Corp Electronics and Missiles Div (USA) |
NSN 5340-01-036-9744 is a Cap,protective,dust and Moisture, manufactured by Lockheed Martin Corp Electronics and Missiles Div, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-036-9744 has 1 manufacturer part number on file: 126839 (Lockheed Martin Corp Electronics and Missiles Div).
1 possible match (shared part number, not a government interchangeability claim): 5930-01-319-9631. Verify interchangeability with system specifications before substitution.
Key specifications for 126839: Width Across Flats: 0.080 INCHES NOMINAL IN; Design Type: FRICTION; Overall Diameter: 5.160 INCHES NOMINAL IN; Opening Inside Diameter for Which Designed: 5.000 INCHES NOMINAL IN. 7 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.