The Crystal Unit,quartz, cataloged under National Stock Number 5955-01-421-4121, 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 12 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5955-01-421-4121 |
| Primary Part Number | MM-49N1C3A-2MHZ |
| 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 | -0.005 TO 0.005 |
| Terminal Diameter | 0.017 INCHES NOMINAL IN |
| Terminal Length | 0.500 INCHES MINIMUM IN |
| Mode of Oscillation | FUNDAMENTAL |
| Equivalent Resistance Value in Ohms | 500.0 MAXIMUM |
| Overall Thickness | 0.183 INCHES NOMINAL IN |
| Style Designator | OVAL BODY, WIRE LEADS |
| Center to Center Distance Between Terminals | 0.192 INCHES NOMINAL IN |
| Load Capacitance in Picofarads | 20.0 NOMINAL |
| Circuit Resonance | ANTIRESONANCE |
| Operating Temp Range | -20.0 TO 70.0 CELSIUS DEGC |
| Specified Frequency | 2.000 MEGAHERTZ |
| 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 |
|---|---|
| MM-49N1C3A-2MHZ PRIMARY | Monitor Products Co. Inc. Dba Monitor Products Co. Inc. (USA) |
NSN 5955-01-421-4121 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 5955-01-421-4121 has 1 manufacturer part number on file: MM-49N1C3A-2MHZ (Monitor Products Co. Inc. Dba Monitor Products Co. Inc.).
Key specifications for MM-49N1C3A-2MHZ: Frequency Tolerance for Operating Temp in Percent: -0.005 TO 0.005; Terminal Diameter: 0.017 INCHES NOMINAL IN; Terminal Length: 0.500 INCHES MINIMUM IN; Mode of Oscillation: FUNDAMENTAL. 12 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 5955-01-421-4121 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.