The Heat Sink,electrical-Electronic, cataloged under National Stock Number 5999-01-123-1663, is classified within Federal Supply Class 5999 (Miscellaneous Electrical and Electronic Components) of the Electrical and Electronic Equipment Components group. Government technical data includes 3 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5999-01-123-1663 |
| Item Name | Heat Sink,electrical-Electronic |
| FSC / FSG | 5999 / 59 — Miscellaneous Electrical and Electronic Components |
| Status | ACTIVE |
| Overall Diameter | 0.360 INCHES NOMINAL IN |
| Material Document and Classification | MIL-I-10 MIL SPEC SINGLE MATERIAL RESPONSE |
| Material | BERYLLIUM OXIDE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 4005-30-3 | 3/9 Design control — primary reference Thermalloy Co Inc |
| SM-A-858624 | 7/2 Vendor item drawing reference U.S. Government activity |
| 4005-30-3 | 5/9 Secondary reference IV-Electronic Klaus Vespermann Kg |
NSN 5999-01-123-1663 is a Heat Sink,electrical-Electronic, classified under FSC 5999, Miscellaneous Electrical and Electronic Components. Status: active.
Key specifications for 5999-01-123-1663: Overall Diameter: 0.360 INCHES NOMINAL IN; Material Document and Classification: MIL-I-10 MIL SPEC SINGLE MATERIAL RESPONSE; Special Features: WHITE COLOR FINISH,22500 PSI COMPRESSIVE STRENGTH,700 VOLTS/MIL DIELECTRIC STRENGTH,4200 DEG F MAX USE TEMPERTURE DEGF; Material: BERYLLIUM OXIDE. 3 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.