The Heat Sink-Insulator, cataloged under National Stock Number 5999-01-718-8978, 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 Boyd Laconia Llc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.
| Item Name | Heat Sink-Insulator |
| FSC / FSG | 5999 — Miscellaneous Electrical and Electronic Components (FSG 59) |
| Manufacturers | Boyd Laconia Llc (CAGE 1N6F3) |
| Parameter | Value |
|---|---|
| NSN | 5999-01-718-8978 |
| Primary Part Number | 53-77-4G |
| Item Name | Heat Sink-Insulator |
| FSC / FSG | 5999 / 59 — Miscellaneous Electrical and Electronic Components |
| Manufacturer | Boyd Laconia Llc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 53-77-4G PRIMARY | Boyd Laconia Llc (USA) |
| Reference | Meaning |
|---|---|
| 034746 | D/9 Drawing number reference only Boyd Laconia Llc |
NSN 5999-01-718-8978 is a Heat Sink-Insulator, manufactured by Boyd Laconia Llc, classified under FSC 5999, Miscellaneous Electrical and Electronic Components. Status: active.
NSN 5999-01-718-8978 has 1 manufacturer part number on file: 53-77-4G (Boyd Laconia Llc).
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.