The Crystal Unit,quartz, cataloged under National Stock Number 5955-01-374-2957, is classified within Federal Supply Class 5955 (Oscillators and Piezoelectric Crystals) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Thales Defense & Security Inc Dba Thales Communications Inc. Government technical data includes 14 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5955-01-374-2957 |
| Primary Part Number | SS-37104 |
| Item Name | Crystal Unit,quartz |
| FSC / FSG | 5955 / 59 — Oscillators and Piezoelectric Crystals |
| Manufacturer | Thales Defense & Security Inc Dba Thales Communications Inc |
| Status | ACTIVE |
| Frequency Tolerance for Operating Temp in Percent | -0.005 TO 0.005 |
| Terminal Diameter | 0.017 INCHES NOMINAL IN |
| Terminal Length | 0.750 INCHES MAXIMUM IN |
| Mode of Oscillation | FUNDAMENTAL |
| Equivalent Resistance Value in Ohms | 100.0 MAXIMUM |
| Overall Thickness | 0.150 INCHES MAXIMUM IN |
| Style Designator | OVAL BODY, WIRE LEADS |
| Drive Level Rating | 1.0 MILLIWATTS NOMINAL |
| Center to Center Distance Between Terminals | 0.192 INCHES NOMINAL IN |
| Load Capacitance in Picofarads | 18.0 NOMINAL |
| Circuit Resonance | ANTIRESONANCE |
| Shunt Capacitance in Picofarads | 1.0 MINIMUM AND 5.0 MAXIMUM |
| Operating Temp Range | +0.0 TO 70.0 CELSIUS DEGC |
| Specified Frequency | 4.000 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 |
|---|---|
| ATS-49-4MHZ | M-Tron Industries, Inc (USA) |
| SS-37104 PRIMARY | Thales Defense & Security Inc Dba Thales Communications Inc (USA) |
NSN 5955-01-374-2957 is a Crystal Unit,quartz, manufactured by Thales Defense & Security Inc Dba Thales Communications Inc, classified under FSC 5955, Oscillators and Piezoelectric Crystals. Status: active.
NSN 5955-01-374-2957 has 2 manufacturer part numbers on file: ATS-49-4MHZ (M-Tron Industries, Inc), SS-37104 (Thales Defense & Security Inc Dba Thales Communications Inc).
Key specifications for SS-37104: Frequency Tolerance for Operating Temp in Percent: -0.005 TO 0.005; Terminal Diameter: 0.017 INCHES NOMINAL IN; Terminal Length: 0.750 INCHES MAXIMUM IN; Mode of Oscillation: FUNDAMENTAL. 14 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.