The Plug,protective,dust and Moistur, cataloged under National Stock Number 5340-00-290-3581, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Hydro-Aire Aerospace Corp. Dba Lear Romec Div Lear Romec. Government technical data includes 5 specifications, cited from the U.S. Government catalog. The record lists 8 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5340-00-290-3581 |
| Primary Part Number | RA3540-3 |
| Item Name | Plug,protective,dust and Moistur |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Hydro-Aire Aerospace Corp. Dba Lear Romec Div Lear Romec |
| Status | ACTIVE |
| Design Type | THREADED |
| Overall Diameter | 0.563 INCHES NOMINAL IN |
| Drive Type | SCREW SLOT OR SERRATED |
| Material | PLASTIC |
| Thread Size and Series/type Designator | 1/2-14 NPT |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| RA3540-3 PRIMARY | Hydro-Aire Aerospace Corp. Dba Lear Romec Div Lear Romec (USA) |
| 393296 PRIMARY | Honeywell International Inc Div Aerospace-South Bend (bendix Dr) (USA) |
| 19H911-4 PRIMARY | Westinghouse Electric Corp (USA) |
| U400513 PRIMARY | Triumph Thermal Systems, Llc (USA) |
| 61561 | Eaton Aerospace, Llc Dba Jackson South (USA) |
| B61561 PRIMARY | Eaton Aerospace, Llc Dba Jackson South (USA) |
| 890335-4 PRIMARY | Honeywell International, Inc Div Aerospace-Tucson (USA) |
| M400-19 PRIMARY | Ontic Engineering & Manufacturing, Inc Dba Ontic Us (USA) |
| Reference | Meaning |
|---|---|
| 74537-4 | 5/9 Secondary reference Honeywell Intl Inc Defense Avionics Systems Former Bendix Navigation and Control Systems |
| 890335-4 | 5/9 Secondary reference Honeywell Intl Inc Defense Avionics Systems Former Bendix Navigation and Control Systems |
| 4-1042-34-4 | 5/9 Secondary reference Parker-Hannifin Corporation Dba Pneutronics Div Corporate Headquarters |
| M400-19 | 5/9 Secondary reference Donallco Inc |
| 890335-4 | 5/9 Secondary reference U.S. Government activity |
| 4-1042-34-4 | 3/2 Design control — primary reference U.S. Government activity |
| 74537-4 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5340-00-290-3581 is a Plug,protective,dust and Moistur, manufactured by Hydro-Aire Aerospace Corp. Dba Lear Romec Div Lear Romec, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-00-290-3581 has 8 manufacturer part numbers on file: RA3540-3 (Hydro-Aire Aerospace Corp. Dba Lear Romec Div Lear Romec), 393296 (Honeywell International Inc Div Aerospace-South Bend (bendix Dr)), 19H911-4 (Westinghouse Electric Corp), U400513 (Triumph Thermal Systems, Llc), 61561 (Eaton Aerospace, Llc Dba Jackson South) and 3 more.
Key specifications for RA3540-3: Design Type: THREADED; Overall Diameter: 0.563 INCHES NOMINAL IN; Drive Type: SCREW SLOT OR SERRATED; Material: PLASTIC. 5 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.