The Clock Assembly, cataloged under National Stock Number 6645-01-059-1584, is classified within Federal Supply Class 6645 (Time Measuring Instruments) of the Instruments and Laboratory Equipment group. The manufacturer of record is Keysight Technologies Inc. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Clock Assembly |
| FSC / FSG | 6645 — Time Measuring Instruments (FSG 66) |
| Manufacturers | Keysight Technologies Inc (CAGE 7ZXR5) |
| Parameter | Value |
|---|---|
| NSN | 6645-01-059-1584 |
| Primary Part Number | 1010-0021 |
| Item Name | Clock Assembly |
| FSC / FSG | 6645 / 66 — Time Measuring Instruments |
| Manufacturer | Keysight Technologies Inc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 1010-0021 PRIMARY | Keysight Technologies Inc (USA) |
| Reference | Meaning |
|---|---|
| 1010-0021 | 3/9 Design control — primary reference Keysight Technologies, Inc. |
| 1010-0021 | 5/9 Secondary reference Hewlett-Packard Company Dba HP |
NSN 6645-01-059-1584 is a Clock Assembly, manufactured by Keysight Technologies Inc, classified under FSC 6645, Time Measuring Instruments. Status: active.
NSN 6645-01-059-1584 has 1 manufacturer part number on file: 1010-0021 (Keysight Technologies Inc).
2 possible matches (shared part number, not a government interchangeability claim): 9905-01-210-2233, 6140-01-512-9767. Verify interchangeability with system specifications before substitution.
No hazard code in the DLA record (HMIC N). 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.