The Crystal Unit,quartz, cataloged under National Stock Number 5955-00-577-1397, is classified within Federal Supply Class 5955 (Oscillators and Piezoelectric Crystals) of the Electrical and Electronic Equipment Components group. Government technical data includes 14 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5955-00-577-1397 |
| Item Name | Crystal Unit,quartz |
| FSC / FSG | 5955 / 59 — Oscillators and Piezoelectric Crystals |
| Status | ACTIVE |
| Frequency Tolerance for Operating Temp in Percent | -0.005 TO 0.005 |
| Terminal Diameter | 0.057 INCHES MINIMUM AND 0.067 INCHES MAXIMUM IN |
| Overall Diameter | 0.553 INCHES MINIMUM AND 0.563 INCHES MAXIMUM IN |
| Terminal Length | 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN |
| Mode of Oscillation | THIRD OVERTONE |
| Equivalent Resistance Value in Ohms | 50.0 NOMINAL |
| Style Designator | ROUND BODY, AXIAL LEADS |
| Drive Level Rating | 1.6 MILLIWATTS MINIMUM AND 2.4 MILLIWATTS MAXIMUM |
| Body Length | 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN |
| Circuit Resonance | SERIES RESONANCE |
| Shunt Capacitance in Picofarads | 7.0 MAXIMUM |
| Operating Temp Range | -55.0 TO 105.0 CELSIUS DEGC |
| Test Data Document | 81349-MILC3098 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.). |
| Specified Frequency | 20.51666 MEGAHERTZ |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| MIL-C-3098/6 | 4/1 Identification reference U.S. Government activity |
| CR-24/U20.516660MHZ | 5/9 Secondary reference U.S. Government activity |
| CR24/U20M51666 | 2/2 Government specification standardization U.S. Government activity |
NSN 5955-00-577-1397 is a Crystal Unit,quartz, classified under FSC 5955, Oscillators and Piezoelectric Crystals. Status: active.
Key specifications for 5955-00-577-1397: Frequency Tolerance for Operating Temp in Percent: -0.005 TO 0.005; Terminal Diameter: 0.057 INCHES MINIMUM AND 0.067 INCHES MAXIMUM IN; Overall Diameter: 0.553 INCHES MINIMUM AND 0.563 INCHES MAXIMUM IN; Terminal Length: 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN. 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.