The Crystal Unit,quartz, cataloged under National Stock Number 5955-00-855-3937, is classified within Federal Supply Class 5955 (Oscillators and Piezoelectric Crystals) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Gyrodyne Co of America Inc. Government technical data includes 13 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5955-00-855-3937 |
| Primary Part Number | Y63E880117 |
| Item Name | Crystal Unit,quartz |
| FSC / FSG | 5955 / 59 — Oscillators and Piezoelectric Crystals |
| Manufacturer | Gyrodyne Co of America Inc |
| Status | ACTIVE |
| Frequency Tolerance for Operating Temp in Percent | -0.020 TO 0.020 |
| Terminal Diameter | 0.0179 INCHES NOMINAL IN |
| Terminal Length | 2.000 INCHES NOMINAL IN |
| Mode of Oscillation | FUNDAMENTAL |
| Body Width | 0.725 INCHES NOMINAL IN |
| Overall Thickness | 0.345 INCHES NOMINAL IN |
| Style Designator | RECTANGULAR BODY, GULL WING |
| Center to Center Distance Between Terminals | 0.486 INCHES NOMINAL IN |
| Circuit Resonance | SERIES RESONANCE |
| Operating Temp Range | -40.0 TO 85.0 CELSIUS DEGC |
| Material | GLASS COVER HOLDER |
| Specified Frequency | 1.024 MEGAHERTZ |
| Body Thickness | 0.317 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 |
|---|---|
| Y63E880117 PRIMARY | Gyrodyne Co of America Inc (USA) |
| 5121109 | Microsemi Corp. - High Performance Timing Dba Vectron International- Cancelled (USA) |
| Reference | Meaning |
|---|---|
| 6420-5009-1 | 5/9 Secondary reference Drs Icas, Llc |
| 5121109 | 5/9 Secondary reference Piezo Crystal Co |
NSN 5955-00-855-3937 is a Crystal Unit,quartz, manufactured by Gyrodyne Co of America Inc, classified under FSC 5955, Oscillators and Piezoelectric Crystals. Status: active.
NSN 5955-00-855-3937 has 2 manufacturer part numbers on file: Y63E880117 (Gyrodyne Co of America Inc), 5121109 (Microsemi Corp. - High Performance Timing Dba Vectron International- Cancelled).
1 possible match (shared part number, not a government interchangeability claim): 3020-00-921-6994. Verify interchangeability with system specifications before substitution.
Key specifications for Y63E880117: Frequency Tolerance for Operating Temp in Percent: -0.020 TO 0.020; Terminal Diameter: 0.0179 INCHES NOMINAL IN; Terminal Length: 2.000 INCHES NOMINAL 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.