The Boot,dust and Moisture Seal, cataloged under National Stock Number 5340-01-380-4289, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Microflect Co. Inc. Dba Valmont/microflect. Government technical data includes 2 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5340-01-380-4289 |
| Primary Part Number | BEWR284 |
| Item Name | Boot,dust and Moisture Seal |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Microflect Co. Inc. Dba Valmont/microflect |
| Status | ACTIVE |
| Style Designator | THRU-HOLE |
| Material | ELASTOMER POLYCHLOROPRENE BODY |
| 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 |
|---|---|
| BEWR284 PRIMARY | Microflect Co. Inc. Dba Valmont/microflect (USA) |
| Reference | Meaning |
|---|---|
| 1217073-201 | 5/9 Secondary reference Lockheed Martin Corporation Div Rms - Mitchel Field |
| 1217073-201 | 7/1 Vendor item drawing reference Lockheed Martin Corporation Div Rms |
| B1270E | 5/9 Secondary reference Microflect Co. Inc. Dba Valmont/microflect |
NSN 5340-01-380-4289 is a Boot,dust and Moisture Seal, manufactured by Microflect Co. Inc. Dba Valmont/microflect, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-380-4289 has 1 manufacturer part number on file: BEWR284 (Microflect Co. Inc. Dba Valmont/microflect).
Key specifications for BEWR284: Overall Height: 2.375 INCHES NOMINAL IN; Style Designator: THRU-HOLE; Overall Length: 7.125 INCHES NOMINAL IN; Material: ELASTOMER POLYCHLOROPRENE BODY. 2 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.