The Heat Sink,electrical-Electronic, cataloged under National Stock Number 5999-01-336-0190, 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 Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. Government technical data includes 8 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. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5999-01-336-0190 |
| Primary Part Number | 1668AS401-1 |
| Item Name | Heat Sink,electrical-Electronic |
| FSC / FSG | 5999 / 59 — Miscellaneous Electrical and Electronic Components |
| Manufacturer | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| Status | ACTIVE |
| Mounting Facility Type and Quantity | 1 THREADED HOLE(S) SINGLE MOUNTING FACILITY |
| Body Style | VERTICALLY MOUNTED W/BOARD MOUNTING TABS |
| Nominal Thread Size | 0.250 INCHES SINGLE MOUNTING FACILITY IN |
| Accommodated Device Mounting Hole Pattern Style | FOUR HOLE |
| Thread Class | 2B SINGLE MOUNTING FACILITY |
| Thread Quantity Per Inch | 20 SINGLE MOUNTING FACILITY |
| Accommodated Device Mounting Hole Quantity | 4 |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) SINGLE MOUNTING FACILITY |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| 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 |
|---|---|
| 1668AS401-1 PRIMARY | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
NSN 5999-01-336-0190 is a Heat Sink,electrical-Electronic, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 5999, Miscellaneous Electrical and Electronic Components. Status: active.
NSN 5999-01-336-0190 has 1 manufacturer part number on file: 1668AS401-1 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier).
Key specifications for 1668AS401-1: Mounting Facility Type and Quantity: 1 THREADED HOLE(S) SINGLE MOUNTING FACILITY; Overall Height: 4.000 INCHES NOMINAL IN; Body Style: VERTICALLY MOUNTED W/BOARD MOUNTING TABS; Overall Length: 5.500 INCHES NOMINAL IN. 8 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.
NSN 5999-01-336-0190 has DEMIL Code B. 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.