The Heat Sink,electrical-Electronic, cataloged under National Stock Number 5999-01-014-4963, 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 Div Rms. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5999-01-014-4963 |
| Primary Part Number | 77C708431P003 |
| Item Name | Heat Sink,electrical-Electronic |
| FSC / FSG | 5999 / 59 — Miscellaneous Electrical and Electronic Components |
| Manufacturer | Lockheed Martin Corporation Div Rms |
| Status | ACTIVE |
| Mounting Facility Type and Quantity | 8 UNTHREADED HOLE(S) FIRST MOUNTING FACILITY |
| Mounting Facility Type and Quantity | 4 UNTHREADED HOLE(S) SECOND MOUNTING FACILITY |
| Mounting Facility Type and Quantity | 2 UNTHREADED HOLE(S) THIRD MOUNTING FACILITY |
| Unthreaded Mounting Hole Diameter | 0.140 INCHES NOMINAL FIRST MOUNTING FACILITY IN |
| Unthreaded Mounting Hole Diameter | 0.234 INCHES NOMINAL SECOND MOUNTING FACILITY IN |
| Unthreaded Mounting Hole Diameter | 0.290 INCHES NOMINAL THIRD MOUNTING FACILITY IN |
| Material | ALUMINUM |
| 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 | J |
| Part Number | Manufacturer |
|---|---|
| 77C708431P003 PRIMARY | Lockheed Martin Corporation Div Rms (USA) |
| 77C708431P3 | Hancock Manufacturing Corp (USA) |
NSN 5999-01-014-4963 is a Heat Sink,electrical-Electronic, manufactured by Lockheed Martin Corporation Div Rms, classified under FSC 5999, Miscellaneous Electrical and Electronic Components. Status: active.
NSN 5999-01-014-4963 has 2 manufacturer part numbers on file: 77C708431P003 (Lockheed Martin Corporation Div Rms), 77C708431P3 (Hancock Manufacturing Corp).
Key specifications for 77C708431P003: Mounting Facility Type and Quantity: 8 UNTHREADED HOLE(S) FIRST MOUNTING FACILITY; Mounting Facility Type and Quantity: 4 UNTHREADED HOLE(S) SECOND MOUNTING FACILITY; Mounting Facility Type and Quantity: 2 UNTHREADED HOLE(S) THIRD MOUNTING FACILITY; Overall Height: 5.000 INCHES NOMINAL IN. 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.