The Crystal Unit,quartz, cataloged under National Stock Number 5955-00-925-8013, is classified within Federal Supply Class 5955 (Oscillators and Piezoelectric Crystals) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Raytheon Company. Government technical data includes 19 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5955-00-925-8013 |
| Primary Part Number | 537961-1 |
| Item Name | Crystal Unit,quartz |
| FSC / FSG | 5955 / 59 — Oscillators and Piezoelectric Crystals |
| Manufacturer | Raytheon Company |
| Status | ACTIVE |
| Controlled Reference Temp | 75.0 CELSIUS DEGC |
| Operable Temp Range | -55.0 TO 70.0 CELSIUS DEGC |
| Frequency Tolerance for Operating Temp in Percent | -0.002 TO 0.002 AND -0.007 TO 0.007 |
| Terminal Diameter | 0.040 INCHES NOMINAL IN |
| Terminal Length | 0.238 INCHES NOMINAL IN |
| Mode of Oscillation | FUNDAMENTAL |
| Body Width | 0.526 INCHES NOMINAL IN |
| Equivalent Resistance Value in Ohms | 50.0 NOMINAL |
| Overall Thickness | 0.200 INCHES NOMINAL IN |
| Style Designator | TUBE BODY, WIRE LEADS |
| Drive Level Rating | 5.0 MILLIWATTS NOMINAL AND 4.0 MILLIWATTS MINIMUM AND 6.0 MILLIWATTS MAXIMUM |
| Body Length | 0.550 INCHES NOMINAL IN |
| Center to Center Distance Between Terminals | 0.275 INCHES NOMINAL IN |
| Load Capacitance in Picofarads | 32.0 NOMINAL AND 31.5 MINIMUM AND 32.5 MAXIMUM |
| Circuit Resonance | ANTIRESONANCE |
| Operating Temp Range | +70.0 TO 80.0 CELSIUS AND -55.0 TO 90.0 CELSIUS DEGC |
| Material | GLASS COVER HOLDER |
| Specified Frequency | 3.650 MEGAHERTZ |
| Body Thickness | 0.200 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 |
|---|---|
| 537961-1 | Microsemi Corp. - High Performance Timing Dba Vectron International- Cancelled (USA) |
| 537961-1 PRIMARY | Raytheon Company (USA) |
| Reference | Meaning |
|---|---|
| 537961-1 | 5/9 Secondary reference Inficon Edc Inc. |
| 537961-1 | 5/9 Secondary reference Electronic Research Company |
NSN 5955-00-925-8013 is a Crystal Unit,quartz, manufactured by Raytheon Company, classified under FSC 5955, Oscillators and Piezoelectric Crystals. Status: active.
NSN 5955-00-925-8013 has 2 manufacturer part numbers on file: 537961-1 (Microsemi Corp. - High Performance Timing Dba Vectron International- Cancelled), 537961-1 (Raytheon Company).
1 possible match (shared part number, not a government interchangeability claim): 1220-01-093-7700. Verify interchangeability with system specifications before substitution.
Key specifications for 537961-1: Controlled Reference Temp: 75.0 CELSIUS DEGC; Operable Temp Range: -55.0 TO 70.0 CELSIUS DEGC; Frequency Tolerance for Operating Temp in Percent: -0.002 TO 0.002 AND -0.007 TO 0.007; Terminal Diameter: 0.040 INCHES NOMINAL IN. 19 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.