The Crystal Unit,quartz, cataloged under National Stock Number 5955-00-159-7559, 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 Inc. Government technical data includes 15 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5955-00-159-7559 |
| Primary Part Number | A44197-1 |
| Item Name | Crystal Unit,quartz |
| FSC / FSG | 5955 / 59 — Oscillators and Piezoelectric Crystals |
| Manufacturer | Cts Inc |
| Status | ACTIVE |
| Frequency Tolerance for Operating Temp in Percent | -0.001 TO 0.001 |
| Terminal Diameter | 0.048 INCHES MINIMUM AND 0.052 INCHES MAXIMUM IN |
| Terminal Length | 0.223 INCHES MINIMUM AND 0.248 INCHES MAXIMUM IN |
| Mode of Oscillation | FUNDAMENTAL |
| Equivalent Resistance Value in Ohms | 22.0 MAXIMUM |
| Overall Thickness | 0.352 INCHES MAXIMUM IN |
| Style Designator | OVAL BODY, PIN TERMINALS |
| Drive Level Rating | 50.0 MICROWATTS NOMINAL |
| Body Length | 0.775 INCHES MAXIMUM IN |
| Center to Center Distance Between Terminals | 0.478 INCHES MINIMUM AND 0.494 INCHES MAXIMUM IN |
| Circuit Resonance | SERIES RESONANCE |
| Shunt Capacitance in Picofarads | 4.5 MINIMUM AND 5.5 MAXIMUM |
| Operating Temp Range | +80.0 TO 85.0 CELSIUS DEGC |
| Material | GLASS COVER HOLDER |
| Specified Frequency | 10.000 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 |
|---|---|
| A44197-1 | Cts Inc (USA) |
| Reference | Meaning |
|---|---|
| A44197-1 | 3/9 Design control — primary reference Dar Electronics Inc Dba National Radio Co |
| A44197-1 | 5/9 Secondary reference Electronic Research Company |
| EM148 | 5/9 Secondary reference Trw Electronics and Defense Sector Rf Devices |
| A44197-1 | C/1 Advisory reference — outside the item-of-supply concept Microsemi Corp. - High Performance Timing Dba Vectron International- Cancelled |
| A44197-1 | C/1 Advisory reference — outside the item-of-supply concept L3harris Technologies, Inc. Dba Harris Corp Div Harris Defense Communications |
| A44197-1 | 5/9 Secondary reference Piezo Crystal Co |
NSN 5955-00-159-7559 is a Crystal Unit,quartz, manufactured by Cts Inc, classified under FSC 5955, Oscillators and Piezoelectric Crystals. Status: active.
NSN 5955-00-159-7559 has 1 manufacturer part number on file: A44197-1 (Cts Inc).
1 possible match (shared part number, not a government interchangeability claim): 5998-01-430-2767. Verify interchangeability with system specifications before substitution.
Key specifications for A44197-1: Frequency Tolerance for Operating Temp in Percent: -0.001 TO 0.001; Terminal Diameter: 0.048 INCHES MINIMUM AND 0.052 INCHES MAXIMUM IN; Terminal Length: 0.223 INCHES MINIMUM AND 0.248 INCHES MAXIMUM IN; Mode of Oscillation: FUNDAMENTAL. 15 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.