The Crystal Unit Set,quartz, cataloged under National Stock Number 5955-01-312-0489, is classified within Federal Supply Class 5955 (Oscillators and Piezoelectric Crystals) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Northrop Grumman Support Services Corp. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5955-01-312-0489 |
| Primary Part Number | 645A007G02 |
| Item Name | Crystal Unit Set,quartz |
| FSC / FSG | 5955 / 59 — Oscillators and Piezoelectric Crystals |
| Manufacturer | Northrop Grumman Support Services Corp |
| Status | ACTIVE |
| Unit Package Quantity | 16 |
| Usage Location | COMMUNICATIONS ZONE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 7390601 | Microsemi Corp. - High Performance Timing Dba Vectron International- Cancelled (USA) |
| 645A007G02 PRIMARY | Northrop Grumman Support Services Corp (USA) |
| Reference | Meaning |
|---|---|
| 7390601 | 5/9 Secondary reference Piezo Crystal Co |
| 645A007G02 | 5/9 Secondary reference Piezo Crystal Co |
| 645A007G02 | 3/9 Design control — primary reference U.S. Government activity |
NSN 5955-01-312-0489 is a Crystal Unit Set,quartz, manufactured by Northrop Grumman Support Services Corp, classified under FSC 5955, Oscillators and Piezoelectric Crystals. Status: active.
NSN 5955-01-312-0489 has 2 manufacturer part numbers on file: 7390601 (Microsemi Corp. - High Performance Timing Dba Vectron International- Cancelled), 645A007G02 (Northrop Grumman Support Services Corp).
Key specifications for 645A007G02: Unit Package Quantity: 16; Special Features: THIS SET CONTAINS 16 DIFFERENT FREQUENCIES; Usage Location: COMMUNICATIONS ZONE. 2 specifications are 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.
NSN 5955-01-312-0489 has DEMIL Code D. 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.