The Crystal Unit,quartz, cataloged under National Stock Number 5955-00-259-4146, is classified within Federal Supply Class 5955 (Oscillators and Piezoelectric Crystals) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Cts Valpey Corporation. Government technical data includes 13 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5955-00-259-4146 |
| Primary Part Number | CL566-18 |
| Item Name | Crystal Unit,quartz |
| FSC / FSG | 5955 / 59 — Oscillators and Piezoelectric Crystals |
| Manufacturer | Cts Valpey Corporation |
| Status | ACTIVE |
| Frequency Tolerance for Operating Temp in Percent | -0.005 TO 0.005 AND -0.0010 TO 0.0010 |
| Terminal Diameter | 0.016 INCHES MINIMUM AND 0.019 INCHES MAXIMUM IN |
| Terminal Length | 1.500 INCHES MINIMUM IN |
| Mode of Oscillation | FUNDAMENTAL |
| Equivalent Resistance Value in Ohms | 1000.0 MAXIMUM |
| Overall Thickness | 0.183 INCHES MAXIMUM IN |
| Style Designator | OVAL BODY, PIN TERMINALS |
| Drive Level Rating | 10.0 MILLIWATTS NOMINAL AND 9.0 MILLIWATTS MINIMUM AND 11.0 MILLIWATTS MAXIMUM |
| Center to Center Distance Between Terminals | 0.184 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN |
| Circuit Resonance | SERIES RESONANCE |
| Operating Temp Range | -55.0 TO 105.0 CELSIUS AND -55.0 TO 125.0 CELSIUS DEGC |
| Material | GLASS COVER HOLDER |
| Specified Frequency | 880.804 KILOHERTZ |
| 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 |
|---|---|
| CL566-18 | Cts Valpey Corporation (USA) |
| Reference | Meaning |
|---|---|
| 2865W10-018 | 3/2 Design control — primary reference U.S. Government activity |
| 2865W10P018 | 5/9 Secondary reference Murata Erie North America Inc State College Opns |
| 2865W10P018 | 5/9 Secondary reference Erie Specialty Products Inc |
NSN 5955-00-259-4146 is a Crystal Unit,quartz, manufactured by Cts Valpey Corporation, classified under FSC 5955, Oscillators and Piezoelectric Crystals. Status: active.
NSN 5955-00-259-4146 has 1 manufacturer part number on file: CL566-18 (Cts Valpey Corporation).
Key specifications for CL566-18: Frequency Tolerance for Operating Temp in Percent: -0.005 TO 0.005 AND -0.0010 TO 0.0010; Terminal Diameter: 0.016 INCHES MINIMUM AND 0.019 INCHES MAXIMUM IN; Terminal Length: 1.500 INCHES MINIMUM IN; Mode of Oscillation: FUNDAMENTAL. 13 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.