The Crystal Unit,quartz, cataloged under National Stock Number 5955-01-283-8140, is classified within Federal Supply Class 5955 (Oscillators and Piezoelectric Crystals) of the Electrical and Electronic Equipment Components group. The manufacturer of record is General Dynamics Mission Systems, Inc.. Government technical data includes 10 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5955-01-283-8140 |
| Primary Part Number | 26-512729-1 |
| Item Name | Crystal Unit,quartz |
| FSC / FSG | 5955 / 59 — Oscillators and Piezoelectric Crystals |
| Manufacturer | General Dynamics Mission Systems, Inc. |
| Status | ACTIVE |
| Frequency Tolerance for Operating Temp in Percent | -0.003 TO 0.003 |
| Overall Diameter | 0.410 INCHES MAXIMUM IN |
| Terminal Length | 0.610 INCHES NOMINAL IN |
| Mode of Oscillation | FUNDAMENTAL |
| Style Designator | HAT TYPE, 4 WIRE LEADS |
| Diameter | 0.325 INCHES NOMINAL IN |
| Load Capacitance in Picofarads | 32.0 NOMINAL |
| Circuit Resonance | ANTIRESONANCE |
| Operating Temp Range | -30.0 TO 70.0 CELSIUS DEGC |
| Specified Frequency | 21.160 MEGAHERTZ |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 26-512729-1 PRIMARY | General Dynamics Mission Systems, Inc. (USA) |
| VF3551 | Cts Valpey Corporation (USA) |
| Reference | Meaning |
|---|---|
| 04-18968-001 | 5/2 Secondary reference U.S. Government activity |
| C18968 RH | 5/2 Secondary reference U.S. Government activity |
NSN 5955-01-283-8140 is a Crystal Unit,quartz, manufactured by General Dynamics Mission Systems, Inc., classified under FSC 5955, Oscillators and Piezoelectric Crystals. Status: active.
NSN 5955-01-283-8140 has 2 manufacturer part numbers on file: 26-512729-1 (General Dynamics Mission Systems, Inc.), VF3551 (Cts Valpey Corporation).
Key specifications for 26-512729-1: Frequency Tolerance for Operating Temp in Percent: -0.003 TO 0.003; Overall Diameter: 0.410 INCHES MAXIMUM IN; Terminal Length: 0.610 INCHES NOMINAL IN; Mode of Oscillation: FUNDAMENTAL. 10 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 5955-01-283-8140 has DEMIL Code D. 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.