The Heat Sink,electrical-Electronic, cataloged under National Stock Number 5999-01-310-3124, 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 12 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5999-01-310-3124 |
| Primary Part Number | 77C716741 |
| 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 | 4 UNTHREADED HOLE(S) THIRD MOUNTING FACILITY |
| Mounting Facility Type and Quantity | 4 UNTHREADED HOLE(S) SECOND MOUNTING FACILITY |
| Mounting Facility Type and Quantity | 2 UNTHREADED HOLE(S) FIRST MOUNTING FACILITY |
| Mounting Facility Type and Quantity | 4 UNTHREADED HOLE(S) FOURTH MOUNTING FACILITY |
| Surface Treatment Document and Classification | MIL-A-8625,TYPE 2,CLASS 2 MIL SPEC SINGLE TREATMENT RESPONSE |
| Unthreaded Mounting Hole Diameter | 0.113 INCHES NOMINAL FIRST MOUNTING FACILITY IN |
| Unthreaded Mounting Hole Diameter | 0.144 INCHES NOMINAL SECOND MOUNTING FACILITY IN |
| Unthreaded Mounting Hole Diameter | 0.201 INCHES NOMINAL FOURTH MOUNTING FACILITY IN |
| Unthreaded Mounting Hole Diameter | 0.215 INCHES NOMINAL THIRD MOUNTING FACILITY IN |
| Material Document and Classification | QQ-A-200/9 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 | J |
| Part Number | Manufacturer |
|---|---|
| 77C716741 PRIMARY | Lockheed Martin Corporation Div Rms (USA) |
| Reference | Meaning |
|---|---|
| 77C716741P001 | C/1 Advisory reference — outside the item-of-supply concept Lockheed Martin Corporation Div Rms |
| 77C716741 | 5/9 Secondary reference Thermalloy Co Inc |
NSN 5999-01-310-3124 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 5999-01-310-3124 has 1 manufacturer part number on file: 77C716741 (Lockheed Martin Corporation Div Rms).
Key specifications for 77C716741: Mounting Facility Type and Quantity: 4 UNTHREADED HOLE(S) THIRD MOUNTING FACILITY; Mounting Facility Type and Quantity: 4 UNTHREADED HOLE(S) SECOND MOUNTING FACILITY; Mounting Facility Type and Quantity: 2 UNTHREADED HOLE(S) FIRST MOUNTING FACILITY; Mounting Facility Type and Quantity: 4 UNTHREADED HOLE(S) FOURTH MOUNTING FACILITY. 12 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.