The Crystal Unit,quartz, cataloged under National Stock Number 5955-01-138-6439, is classified within Federal Supply Class 5955 (Oscillators and Piezoelectric Crystals) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Keysight Technologies Inc. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5955-01-138-6439 |
| Primary Part Number | 0410-0133 |
| Item Name | Crystal Unit,quartz |
| FSC / FSG | 5955 / 59 — Oscillators and Piezoelectric Crystals |
| Manufacturer | Keysight Technologies Inc |
| Status | ACTIVE |
| Specified Frequency | 999.950 MEGAHERTZ |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 0242701 | Microsemi Corp. - High Performance Timing Dba Vectron International- Cancelled (USA) |
| 0410-0133 | Microsemi Corp. - High Performance Timing Dba Vectron International- Cancelled (USA) |
| 0410-0133 PRIMARY | Keysight Technologies Inc (USA) |
| Reference | Meaning |
|---|---|
| 0410-0133 | 5/9 Secondary reference Piezo Crystal Co |
| 0410-0133 | 3/9 Design control — primary reference Keysight Technologies, Inc. |
| 0410-0133 | 5/9 Secondary reference Hewlett-Packard Company Dba HP |
| 0242701 | 5/9 Secondary reference Piezo Crystal Co |
NSN 5955-01-138-6439 is a Crystal Unit,quartz, manufactured by Keysight Technologies Inc, classified under FSC 5955, Oscillators and Piezoelectric Crystals. Status: active.
NSN 5955-01-138-6439 has 3 manufacturer part numbers on file: 0242701 (Microsemi Corp. - High Performance Timing Dba Vectron International- Cancelled), 0410-0133 (Microsemi Corp. - High Performance Timing Dba Vectron International- Cancelled), 0410-0133 (Keysight Technologies Inc).
Key specifications for 0410-0133: Specified Frequency: 999.950 MEGAHERTZ. 1 specification is documented in the U.S. Government catalog.
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.