The Crystal Unit,quartz, cataloged under National Stock Number 5955-01-028-5960, is classified within Federal Supply Class 5955 (Oscillators and Piezoelectric Crystals) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 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 | 5955-01-028-5960 |
| Primary Part Number | 2887378-7 |
| Item Name | Crystal Unit,quartz |
| FSC / FSG | 5955 / 59 — Oscillators and Piezoelectric Crystals |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| Frequency Tolerance for Operating Temp in Percent | -0.0005 TO 0.0005 |
| Terminal Diameter | 0.016 INCHES MINIMUM AND 0.019 INCHES MAXIMUM IN |
| Overall Diameter | 0.408 INCHES MAXIMUM IN |
| Terminal Length | 0.325 INCHES MINIMUM AND 0.350 INCHES MAXIMUM IN |
| Mode of Oscillation | FIFTH OVERTONE |
| Equivalent Resistance Value in Ohms | 50.0 NOMINAL |
| Style Designator | HAT TYPE, 3 WIRE LEADS |
| Diameter | 0.335 INCHES MAXIMUM IN |
| Drive Level Rating | 1.0 MILLIWATTS MAXIMUM |
| Center to Center Distance Between Terminals | 0.190 INCHES MINIMUM AND 0.210 INCHES MAXIMUM IN |
| Circuit Resonance | SERIES RESONANCE |
| Shunt Capacitance in Picofarads | 3.5 NOMINAL |
| Operating Temp Range | -10.0 TO 70.0 CELSIUS AND -55.0 TO 105.0 CELSIUS DEGC |
| Specified Frequency | 135.563333 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 |
|---|---|
| 89-39 | Microsemi Corp. - High Performance Timing Dba Vectron International- Cancelled (USA) |
| 2887378-7 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| C350BDF-00-7 | Wenzel International Inc Div Croven Crystals (CAN) |
| 021-0455-7 | Cts Inc (USA) |
NSN 5955-01-028-5960 is a Crystal Unit,quartz, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 5955, Oscillators and Piezoelectric Crystals. Status: active.
NSN 5955-01-028-5960 has 4 manufacturer part numbers on file: 89-39 (Microsemi Corp. - High Performance Timing Dba Vectron International- Cancelled), 2887378-7 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), C350BDF-00-7 (Wenzel International Inc Div Croven Crystals), 021-0455-7 (Cts Inc).
1 possible match (shared part number, not a government interchangeability claim): 5960-01-265-4487. Verify interchangeability with system specifications before substitution.
Key specifications for 2887378-7: Frequency Tolerance for Operating Temp in Percent: -0.0005 TO 0.0005; Terminal Diameter: 0.016 INCHES MINIMUM AND 0.019 INCHES MAXIMUM IN; Overall Diameter: 0.408 INCHES MAXIMUM IN; Terminal Length: 0.325 INCHES MINIMUM AND 0.350 INCHES MAXIMUM IN. 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.
NSN 5955-01-028-5960 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.