The Heat Sink,electrical-Electronic, cataloged under National Stock Number 5999-01-424-8804, 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 Northrop Grumman Support Services Corp. Government technical data includes 7 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5999-01-424-8804 |
| Primary Part Number | 635A800H04 |
| Item Name | Heat Sink,electrical-Electronic |
| FSC / FSG | 5999 / 59 — Miscellaneous Electrical and Electronic Components |
| Manufacturer | Northrop Grumman Support Services Corp |
| Status | ACTIVE |
| Mounting Facility Type and Quantity | 4 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY |
| Surface Treatment Document and Classification | MIL-A-8625, TYPE II, CLASS 2 MIL SPEC SINGLE TREATMENT RESPONSE |
| Body Style | EXTRUDED |
| Unthreaded Mounting Hole Diameter | 0.092 INCHES MINIMUM AND 0.098 INCHES MAXIMUM SINGLE MOUNTING FACILITY IN |
| Material Document and Classification | QQ-A-200/9, 6063-T6 FED SPEC SINGLE MATERIAL RESPONSE |
| Surface Treatment | ANODIZE |
| Material | ALUMINUM ALLOY |
| 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 | JZ |
| Part Number | Manufacturer |
|---|---|
| 635A800H04 PRIMARY | Northrop Grumman Support Services Corp (USA) |
| Reference | Meaning |
|---|---|
| 621-B-SP | 5/9 Secondary reference Eg and G Wakefield Engineering |
| 635A800H04 | 3/9 Design control — primary reference U.S. Government activity |
NSN 5999-01-424-8804 is a Heat Sink,electrical-Electronic, manufactured by Northrop Grumman Support Services Corp, classified under FSC 5999, Miscellaneous Electrical and Electronic Components. Status: active.
NSN 5999-01-424-8804 has 1 manufacturer part number on file: 635A800H04 (Northrop Grumman Support Services Corp).
Key specifications for 635A800H04: Mounting Facility Type and Quantity: 4 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY; Overall Height: 0.446 INCHES MINIMUM AND 0.476 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-A-8625, TYPE II, CLASS 2 MIL SPEC SINGLE TREATMENT RESPONSE; Body Style: EXTRUDED. 7 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.