The Crystal Unit,quartz, cataloged under National Stock Number 5955-01-101-7886, is classified within Federal Supply Class 5955 (Oscillators and Piezoelectric Crystals) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Crystek Crystals Corporation Dba Crystek Corp. Government technical data includes 14 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5955-01-101-7886 |
| Primary Part Number | A4000-263 |
| Item Name | Crystal Unit,quartz |
| FSC / FSG | 5955 / 59 — Oscillators and Piezoelectric Crystals |
| Manufacturer | Crystek Crystals Corporation Dba Crystek Corp |
| Status | ACTIVE |
| Frequency Tolerance for Operating Temp in Percent | -0.005 TO 0.005 |
| Terminal Diameter | 0.030 INCHES NOMINAL IN |
| Terminal Length | 0.750 INCHES MINIMUM IN |
| Mode of Oscillation | FUNDAMENTAL |
| Body Width | 0.750 INCHES NOMINAL IN |
| Equivalent Resistance Value in Ohms | 540.0 NOMINAL |
| Overall Thickness | 0.345 INCHES NOMINAL IN |
| Style Designator | OVAL BODY, WIRE LEADS |
| Drive Level Rating | 10.0 MILLIWATTS NOMINAL |
| Center to Center Distance Between Terminals | 0.468 INCHES NOMINAL IN |
| Circuit Resonance | SERIES RESONANCE |
| Operating Temp Range | +0.0 TO 90.0 CELSIUS DEGC |
| Specified Frequency | 1.000 MEGAHERTZ |
| Body Thickness | 0.320 INCHES NOMINAL IN |
| 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 |
|---|---|
| A4000-263 | Crystek Crystals Corporation Dba Crystek Corp (USA) |
| Reference | Meaning |
|---|---|
| A4000-263 | 5/9 Secondary reference Alpha Crystal Corp |
| A4000-263 | 3/9 Design control — primary reference Data Test Corp Sub of Autek Systems Corp |
| A4000-263 | 5/9 Secondary reference Inficon Edc Inc. |
| 000961 | 5/9 Secondary reference Data Test Corp Sub of Autek Systems Corp |
NSN 5955-01-101-7886 is a Crystal Unit,quartz, manufactured by Crystek Crystals Corporation Dba Crystek Corp, classified under FSC 5955, Oscillators and Piezoelectric Crystals. Status: active.
NSN 5955-01-101-7886 has 1 manufacturer part number on file: A4000-263 (Crystek Crystals Corporation Dba Crystek Corp).
Key specifications for A4000-263: Frequency Tolerance for Operating Temp in Percent: -0.005 TO 0.005; Terminal Diameter: 0.030 INCHES NOMINAL IN; Terminal Length: 0.750 INCHES MINIMUM IN; Mode of Oscillation: FUNDAMENTAL. 14 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.
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.