The Shielding Gasket,electronic, cataloged under National Stock Number 5999-00-421-5134, is classified within Federal Supply Class 5999 (Miscellaneous Electrical and Electronic Components) of the Electrical and Electronic Equipment Components group. The manufacturer of record is The Dewey Electronics Corporation. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5999-00-421-5134 |
| Primary Part Number | 40844-1 |
| Item Name | Shielding Gasket,electronic |
| FSC / FSG | 5999 / 59 — Miscellaneous Electrical and Electronic Components |
| Manufacturer | The Dewey Electronics Corporation |
| Status | ACTIVE |
| Environmental Protection Material Location | AROUND RF SHIELDING GASKET OUTER PERIMETER |
| Cross-Sectional Height | 0.125 INCHES NOMINAL IN |
| Minor Height | 0.125 INCHES NOMINAL IN |
| Style Designator | NON-CIRCULAR |
| Material Document and Classification | UNABLE TO DECODE |
| Cross-Sectional Shape Style | MESH AND COMPOSITION |
| Aperture Width | 4.813 INCHES NOMINAL IN |
| Minor Width | 0.125 INCHES NOMINAL IN |
| Aperture Length | 10.688 INCHES NOMINAL IN |
| Bolt Hole Quantity | 10 |
| Center to Center Distance Between Bolt Holes Along Length | 3.000 INCHES NOMINAL IN |
| Outside Edge to Bolt Hole Center Distance Along Length | 0.188 INCHES NOMINAL IN |
| Material | UNABLE TO DECODE |
| Hole Diameter | 0.201 INCHES NOMINAL IN |
| Outside Edge to Bolt Hole Center Distance Along Width | 0.188 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Shelf Life Code | 0 |
| Criticality Code | X |
| Unit of Issue | EA |
| Acquisition advice code | J |
NSN 5999-00-421-5134 is a Shielding Gasket,electronic, manufactured by The Dewey Electronics Corporation, classified under FSC 5999, Miscellaneous Electrical and Electronic Components. Status: active.
NSN 5999-00-421-5134 has 2 manufacturer part numbers on file: 40844-1 (Metal Textiles Corporation Dba Metal Textiles Div Electronic Shielding Group), 40844-1 (The Dewey Electronics Corporation).
1 possible match (shared part number, not a government interchangeability claim): 4810-00-704-6962. Verify interchangeability with system specifications before substitution.
Key specifications for 40844-1: Environmental Protection Material Location: AROUND RF SHIELDING GASKET OUTER PERIMETER; Cross-Sectional Height: 0.125 INCHES NOMINAL IN; Minor Height: 0.125 INCHES NOMINAL IN; Style Designator: NON-CIRCULAR. 15 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.