The Crystal Unit,quartz, cataloged under National Stock Number 5955-00-931-9801, is classified within Federal Supply Class 5955 (Oscillators and Piezoelectric Crystals) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Monitor Products Co. Inc. Dba Monitor Products Co. Inc.. Government technical data includes 16 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5955-00-931-9801 |
| Primary Part Number | 63-0087 |
| Item Name | Crystal Unit,quartz |
| FSC / FSG | 5955 / 59 — Oscillators and Piezoelectric Crystals |
| Manufacturer | Monitor Products Co. Inc. Dba Monitor Products Co. Inc. |
| Status | ACTIVE |
| Frequency Tolerance for Operating Temp in Percent | -0.010 TO 0.010 AND -0.100 TO 0.100 |
| Terminal Diameter | 0.050 INCHES NOMINAL IN |
| Terminal Length | 0.500 INCHES NOMINAL IN |
| Mode of Oscillation | FUNDAMENTAL |
| Body Width | 0.812 INCHES NOMINAL IN |
| Equivalent Resistance Value in Ohms | 30000.0 MAXIMUM |
| Overall Thickness | 0.343 INCHES NOMINAL IN |
| Style Designator | BRACKET TYPE, WIRE LEADS |
| Drive Level Rating | 0.1000 MILLIWATTS NOMINAL AND 0.0999 MILLIWATTS MINIMUM AND 0.1001 MILLIWATTS MAXIMUM |
| Body Length | 0.690 INCHES NOMINAL IN |
| Center to Center Distance Between Terminals | 0.486 INCHES NOMINAL IN |
| Circuit Resonance | SERIES RESONANCE |
| Operating Temp Range | -55.0 TO 85.0 CELSIUS DEGC |
| Material | GLASS COVER HOLDER |
| Specified Frequency | 35.3959 KILOHERTZ |
| Body Thickness | 0.312 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 63-0087 PRIMARY | Monitor Products Co. Inc. Dba Monitor Products Co. Inc. (USA) |
| Reference | Meaning |
|---|---|
| MSC1023A | 5/9 Secondary reference Monitor Products Co. Inc. Dba Monitor Products Co. Inc. |
NSN 5955-00-931-9801 is a Crystal Unit,quartz, manufactured by Monitor Products Co. Inc. Dba Monitor Products Co. Inc., classified under FSC 5955, Oscillators and Piezoelectric Crystals. Status: active.
NSN 5955-00-931-9801 has 1 manufacturer part number on file: 63-0087 (Monitor Products Co. Inc. Dba Monitor Products Co. Inc.).
Key specifications for 63-0087: Frequency Tolerance for Operating Temp in Percent: -0.010 TO 0.010 AND -0.100 TO 0.100; Terminal Diameter: 0.050 INCHES NOMINAL IN; Terminal Length: 0.500 INCHES NOMINAL IN; Mode of Oscillation: FUNDAMENTAL. 16 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.
NSN 5955-00-931-9801 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.