The Plug-in Unit,electrical-Electron, cataloged under National Stock Number 6625-01-004-5976, is classified within Federal Supply Class 6625 (Electrical and Electronic Properties Measuring and Testing Instruments) of the Instruments and Laboratory Equipment group. The manufacturer of record is Keysight Technologies Inc. Government technical data includes 2 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Parameter | Value |
|---|---|
| NSN | 6625-01-004-5976 |
| Primary Part Number | 1818A |
| Item Name | Plug-in Unit,electrical-Electron |
| FSC / FSG | 6625 / 66 — Electrical and Electronic Properties Measuring and Testing Instruments |
| Manufacturer | Keysight Technologies Inc |
| Status | ACTIVE |
| Unit Type | TIME-DOMAIN REFLECTOMETER |
| Functional Description | TROUBLESHOOTING SYSTEMS QUICK ANDEASY LOCATIONS OF DISCONTINUITIES |
| 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 |
|---|---|
| 1818A PRIMARY | Keysight Technologies Inc (USA) |
| Reference | Meaning |
|---|---|
| 1818A | 3/9 Design control — primary reference Keysight Technologies, Inc. |
| 1818A | 5/9 Secondary reference Hewlett-Packard Company Dba HP |
NSN 6625-01-004-5976 is a Plug-in Unit,electrical-Electron, manufactured by Keysight Technologies Inc, classified under FSC 6625, Electrical and Electronic Properties Measuring and Testing Instruments. Status: active.
NSN 6625-01-004-5976 has 1 manufacturer part number on file: 1818A (Keysight Technologies Inc).
1 possible match (shared part number, not a government interchangeability claim): 6830-01-680-2129. Verify interchangeability with system specifications before substitution.
Key specifications for 1818A: Unit Type: TIME-DOMAIN REFLECTOMETER; Functional Description: TROUBLESHOOTING SYSTEMS QUICK ANDEASY LOCATIONS OF DISCONTINUITIES; End Item Identification: OSCILLOSCOPE MAINFRAMES 180C/D, 181A/AR, 182C, 183A/B/C/D, 184A/B A. 2 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.