The Heat Sink,electrical-Electronic, cataloged under National Stock Number 5999-01-377-0109, 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 Ge Aviation Systems Llc. Government technical data includes 11 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Parameter | Value |
|---|---|
| NSN | 5999-01-377-0109 |
| Primary Part Number | 710558 |
| Item Name | Heat Sink,electrical-Electronic |
| FSC / FSG | 5999 / 59 — Miscellaneous Electrical and Electronic Components |
| Manufacturer | Ge Aviation Systems Llc |
| Status | ACTIVE |
| Mounting Facility Type and Quantity | 4 UNTHREADED HOLE(S) THIRD MOUNTING FACILITY |
| Mounting Facility Type and Quantity | 8 UNTHREADED HOLE(S) FIRST MOUNTING FACILITY |
| Mounting Facility Type and Quantity | 4 UNTHREADED HOLE(S) SECOND MOUNTING FACILITY |
| Surface Treatment Document and Classification | MIL-C-5541, CLASS 1A MIL SPEC SINGLE TREATMENT RESPONSE A |
| Unthreaded Mounting Hole Diameter | 0.098 INCHES MINIMUM AND 0.103 INCHES MAXIMUM FIRST MOUNTING FACILITY IN |
| Unthreaded Mounting Hole Diameter | 0.296 INCHES NOMINAL SECOND MOUNTING FACILITY IN |
| Unthreaded Mounting Hole Diameter | 0.375 INCHES NOMINAL THIRD MOUNTING FACILITY IN |
| Material Document and Classification | QQ-A-250/8 FED SPEC SINGLE MATERIAL RESPONSE |
| Features Provided | SPECIAL MARKING |
| Surface Treatment | CHROMATE |
| 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 | JN |
| Part Number | Manufacturer |
|---|---|
| 710558 PRIMARY | Ge Aviation Systems Llc (USA) |
| Reference | Meaning |
|---|---|
| 710558 | 5/9 Secondary reference Ge Aviation Systems Llc Dba Ge Aviation Systems Llc |
| 710558 | 3/9 Design control — primary reference Ge Aviation Systems Llc Dba Ge Aviation |
NSN 5999-01-377-0109 is a Heat Sink,electrical-Electronic, manufactured by Ge Aviation Systems Llc, classified under FSC 5999, Miscellaneous Electrical and Electronic Components. Status: active.
NSN 5999-01-377-0109 has 1 manufacturer part number on file: 710558 (Ge Aviation Systems Llc).
1 possible match (shared part number, not a government interchangeability claim): 7510-01-545-5833. Verify interchangeability with system specifications before substitution.
Key specifications for 710558: Mounting Facility Type and Quantity: 4 UNTHREADED HOLE(S) THIRD MOUNTING FACILITY; Mounting Facility Type and Quantity: 8 UNTHREADED HOLE(S) FIRST MOUNTING FACILITY; Mounting Facility Type and Quantity: 4 UNTHREADED HOLE(S) SECOND MOUNTING FACILITY; Overall Height: 0.560 INCHES NOMINAL IN. 11 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.