The Cap,protective,dust and Moisture, cataloged under National Stock Number 5340-00-403-3271, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. Government technical data includes 4 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 5340-00-403-3271 |
| Item Name | Cap,protective,dust and Moisture |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Status | ACTIVE |
| Design Type | FRICTION |
| Opening Inside Diameter for Which Designed | 1.700 INCHES MINIMUM AND 1.800 INCHES MAXIMUM IN |
| Material | PLASTIC, POLYETHYLENE (PP) |
| Inside Diameter Length | 0.950 INCHES MINIMUM AND 1.050 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 |
| Reference | Meaning |
|---|---|
| 1-3-4SC | 5/9 Secondary reference U.S. Government activity |
| 54990 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5340-00-403-3271 is a Cap,protective,dust and Moisture, classified under FSC 5340, Hardware, Commercial. Status: active.
3 possible matches (shared part number, not a government interchangeability claim): 5330-00-973-8903, 5330-01-133-2817, 4010-01-614-0669. Verify interchangeability with system specifications before substitution.
Key specifications for 5340-00-403-3271: Design Type: FRICTION; Opening Inside Diameter for Which Designed: 1.700 INCHES MINIMUM AND 1.800 INCHES MAXIMUM IN; Material: PLASTIC, POLYETHYLENE (PP); Inside Diameter Length: 0.950 INCHES MINIMUM AND 1.050 INCHES MAXIMUM IN. 4 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.