The Crystal Unit,quartz, cataloged under National Stock Number 5955-00-346-2805, 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 13 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5955-00-346-2805 |
| Primary Part Number | KT05-18.0MHZ |
| 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 | -0.002 TO 0.002 |
| Terminal Diameter | 0.015 INCHES MINIMUM AND 0.019 INCHES MAXIMUM IN |
| Overall Diameter | 0.410 INCHES MAXIMUM IN |
| Terminal Length | 1.500 INCHES NOMINAL IN |
| Mode of Oscillation | FUNDAMENTAL |
| Equivalent Resistance Value in Ohms | 30.0 NOMINAL |
| Style Designator | HAT TYPE, 3 WIRE LEADS |
| Diameter | 0.365 INCHES NOMINAL IN |
| Drive Level Rating | 1.0 MILLIWATTS NOMINAL |
| Center to Center Distance Between Terminals | 0.200 INCHES NOMINAL IN |
| Circuit Resonance | SERIES RESONANCE |
| Operating Temp Range | -54.0 TO 71.0 CELSIUS DEGC |
| Specified Frequency | 18.000 MEGAHERTZ |
| 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 |
|---|---|
| KT05-18.0MHZ | Monitor Products Co. Inc. Dba Monitor Products Co. Inc. (USA) |
| Reference | Meaning |
|---|---|
| 122738-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5955-00-346-2805 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 5955-00-346-2805 has 1 manufacturer part number on file: KT05-18.0MHZ (Monitor Products Co. Inc. Dba Monitor Products Co. Inc.).
1 possible match (shared part number, not a government interchangeability claim): 2540-01-589-1103. Verify interchangeability with system specifications before substitution.
Key specifications for KT05-18.0MHZ: Frequency Tolerance for Operating Temp in Percent: -0.002 TO 0.002; Terminal Diameter: 0.015 INCHES MINIMUM AND 0.019 INCHES MAXIMUM IN; Overall Diameter: 0.410 INCHES MAXIMUM IN; Terminal Length: 1.500 INCHES NOMINAL IN. 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.