The Heat Sink-Insulator, cataloged under National Stock Number 5999-01-276-5656, 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 Raytheon Company. Government technical data includes 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5999-01-276-5656 |
| Primary Part Number | A3027095-3 |
| Item Name | Heat Sink-Insulator |
| FSC / FSG | 5999 / 59 — Miscellaneous Electrical and Electronic Components |
| Manufacturer | Raytheon Company |
| Status | ACTIVE |
| Mounting Facility Type and Quantity | 1 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY |
| Overall Diameter | 0.846 INCHES NOMINAL0.846 INCHES NOMINAL IN |
| Unthreaded Mounting Hole Diameter | 0.264 INCHES NOMINAL SINGLE MOUNTING FACILITY 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 | JN |
| Part Number | Manufacturer |
|---|---|
| A3027095-3 | Raytheon Company (USA) |
| Reference | Meaning |
|---|---|
| A3027095-3 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5999-01-276-5656 is a Heat Sink-Insulator, manufactured by Raytheon Company, classified under FSC 5999, Miscellaneous Electrical and Electronic Components. Status: active.
NSN 5999-01-276-5656 has 1 manufacturer part number on file: A3027095-3 (Raytheon Company).
Key specifications for A3027095-3: Mounting Facility Type and Quantity: 1 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY; Overall Height: 0.063 INCHES NOMINAL0.063 INCHES NOMINAL IN; Overall Diameter: 0.846 INCHES NOMINAL0.846 INCHES NOMINAL IN; Unthreaded Mounting Hole Diameter: 0.264 INCHES NOMINAL SINGLE MOUNTING FACILITY IN. 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.