The Heat Sink-Insulator, cataloged under National Stock Number 5999-01-705-4944, 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 Lockheed Martin Corporation. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Item Name | Heat Sink-Insulator |
| FSC / FSG | 5999 — Miscellaneous Electrical and Electronic Components (FSG 59) |
| Manufacturers | Lockheed Martin Corporation (CAGE 04939) |
| Parameter | Value |
|---|---|
| NSN | 5999-01-705-4944 |
| Primary Part Number | 717405339-002 |
| Item Name | Heat Sink-Insulator |
| FSC / FSG | 5999 / 59 — Miscellaneous Electrical and Electronic Components |
| Manufacturer | Lockheed Martin Corporation |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| 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 |
| Part Number | Manufacturer |
|---|---|
| 717405339-002 PRIMARY | Lockheed Martin Corporation (USA) |
| Reference | Meaning |
|---|---|
| 717405339 | D/9 Drawing number reference only Lockheed Martin Corporation |
NSN 5999-01-705-4944 is a Heat Sink-Insulator, manufactured by Lockheed Martin Corporation, classified under FSC 5999, Miscellaneous Electrical and Electronic Components. Status: active.
NSN 5999-01-705-4944 has 1 manufacturer part number on file: 717405339-002 (Lockheed Martin Corporation).
1 possible match (shared part number, not a government interchangeability claim): 5999-01-705-4948. Verify interchangeability with system specifications before substitution.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 5999-01-705-4944 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.